Well, I am a composer, professionally for films. Used to do games the better part of 20 years ago, now I am currently working on films that will be doing festival tours in North America this year before going to streaming and such. Some of my current projects have actors from TV series like "Billy The Kid", "The Last of Us", and more as well as Emmy-winning special effects teams who have worked on films like "Sonic The Hedgehog" and "Child's Play". The reason I preface with that is to say: I don't have the career of John Williams (yet), but I'm not entirely a nobody either, so I am probably qualified enough to give you some honest advice and feedback. I could write you an entire essay, but I will try to keep this as short as possible: Firstly, if you want to be a professional concert composer, then no matter how good you are, that is extremely rare in today's world and to be honest: It kind of always has been. Historically, most works were commissioned by the church, aristocracy, etc. for some reason or another. So, if you were aspiring to simply write music for live performance or albums of orchestral music and make a living on that...I'm sorry to say the odds are astronomically small. Some will suggest you compose for video games, but speaking from experience only a handful of composers have that entire industry locked down. Getting a job that pays ANYTHING in video games is hard to come, the games take years to develop now, everything is a buyout deal, cancellations of entire projects are normal, and this all translates into relatively low annual income even on "AAA" games. Where the real money is in being a composer today, and for the last 40 or so years, is in television and film. Especially long-tail income in the form of royalties and licensing fees that accumulate over decades. Now, to the meat of your question: My brutally-honest answer based on the piece you have shared is "No". If you wanted to compose for films, especially if you have no DAW or MIDI mockup skills, I'm sorry to say it would not cut the mustard for even lower-level indie shorts. Very few musicians to be honest have what it takes to be a film composer, even a middling one. There is a massive list of skills, that take decades to build up, just regarding music and its production before one could confidently score a film. I can honestly say that even 8 years ago, I don't think I would've made much of a film composer, and I had already been writing music for bands or games for years by that point. Not only must you be able to write memorable themes, which this piece does not demonstrate, but you must have a thorough knowledge of orchestration, mixing, MIDI mockups and recording; advanced composition theory that involves: counterpoint, various unusual scales and harmonic progressions that are not typically found in popular music (or even a lot of older orchestral music for that matter), experience with synthesizers, creating realistic mockups, structure that works with a clear emotional arc, writing effective short pieces, writing effective long-form pieces, etc. And this is before we even get into: You have to understand how all these musical devices can relate to linear story-telling and emotion. You have to understand "film" at least as much as you understand "music". There's "composing music" and then there is "composing music that tells a story". You also must be able to be an effective business man. You have to get out there and make friends with directors, producers and editors. Attend festivals and build genuine working relationships with people and be very easy to work with. 99% of composers stumble big time on this one. And one of the hardest things of all is that you have to be extremely-reliable. On a film, and god knows on a TV show, you do not have time for things like writer's block. You need to know theory, composition, orchestration etc. like the back of your hand to be able to write on average 2 minutes of finished music per day to get the job done on time. Not being on time on a film or TV show would be absolutely catastrophic for that studio and I'm not joking when I say that being late would ruin your entire career and cost people potentially millions of dollars. Now bear in mind, on a film you might have just two or three months to write the score. On a TV show a matter of days or weeks per episode. You must be absolutely certain you could deliver on that. The composer is often the very last major person involved with a film aside from the sound mixer and maybe colorist. It is generally the case that the score has been recorded and finished just weeks before a film hits theaters. It is for all of the aforementioned reasons that age 44 is considered "young" to be working as a professional composer in film and tv. Studios and directors are placing an enormous amount of trust on the composer. So most film composers started composing at very young ages, and spent decades in music, honing their craft, making connections and essentially "proving" themselves before anyone trusts them enough to score a film and pay them good money to do it. John Williams, the most successful and iconic film composer (and probably just composer of the 20th century tbh) was already just about 50 years old when he did Jaws and Star Wars. So unfortunately, in the most profitable avenues that I am aware of for being a composer, I don't think you presently have the skills, musically, yet. That is of course fixable, but what you must ask yourself is if everything else that goes with it is something you can do and your personality is a good fit for. Another thing is, I'm not sure how old you are right now, but age is also a factor. Deciding you want to become a professional composer in your 20s is more practical than starting in your mid 30s, for example. Hope this has been of some help. Good luck.