How you get it done doesn’t matter.
You can organize your rehearsal plan with a spreadsheet, a notes app, a pen and paper. You can mark your score with eighteen colored pencils, with highlighters, or a stylus and ForScore. You can arrange or compose at a piano, a DAW, or singing into a Voice Memo.
How you do the work doesn’t matter. What matters is that you get it done, and that you get it into the world.