I’d recommend learning at least basic piano first. If you spend at least an hour each day on focused learning and practice, you could probably be writing basic

I’d recommend learning at least basic piano first. If you spend at least an hour each day on focused learning and practice, you could probably be writing basic music in a year. Pianote.com is where I got started, but now I’m learning on my own. Also learn to transcribe melodies by ear as you go. Start with Happy Birthday and keep practicing.