Schumann orchestration? Contrary to legend, Schumann was not a bad orchestrator. Workaday, like Brahms. Not a colorist like Mahler, Ravel, let's see...Rimsky -Korsakov? Just keep working, but only when you feel like it. That would be my advice, and it is what I do. Great exercise to orchestrate a Schumann piano piece, and piano music in general is hard to orchestrate.