Welcome to the site!
Here is some blunt motivation: Don't start off with this big sprawling adventure, 100k words, 20+ endings, etc. Start small and practice. Learn bit by bit and be honest with your work ethic. Don't bite off more than you can chew and you'll be fine. Also don't be afraid to post short stories you write or ask questions. Everyone is pretty chill, as long as you aren't annoying.