The community is fun! It's filled with so many people willing to help and see you improve. There's also a fine line between thinking you're not ready or not noticing you're ready. So by all means when you feel like you're good enough then give it a go.
I like all his originals! Although I do have this soft spot for his cover of Girlving to the Right by Harufuri.
Actually no. I've been a youtaite for 3 years now and I've been wanting to start a new. If you think it's fun go ahead. You're never gonna run out of songs anyways.
As for publicity, joining a few communities and talking to people in discord servers would be a good way of getting yourself some traffic so don't be afraid, you'll never really know unless you try.