You might find that you don't like using a keyboard to arrange in famitracker. Most trackers for computer have a feature where your computer keyboard becomes a musical keyboard. I don't remember if Fami does, it's been years since I've used it. Anyway, with trackers, you're mostly just inputting notes into what is basically a spreadsheet, and almost 100% of the time, it is not done in real time. If you look at Famitracker and get intimidated, try to give it a chance. Watch tutorials and spend time with it. I'm only saying this because trackers are simply an amazing way to compose music.