Number one for me: write now. Just write. Doesn't matter what, or for who; if you don't write now, you won't get any better, and once you start writing, you'll get more ideas and think of things you'll want to write in the future.
The next thing I've learned is, if you want people to read your work, you have to put it out there for people to read! Publishing somewhere like here or Wattpad is a great start, and then of course is advertising like with these forums, or telling friends/family you'd like their support too, if you don't mind them reading your stories.
And finally, know that your work 1. won't appeal to everyone and 2. all because it does appeal to some people doesn't mean you can't do better. And that's alright. Everyone has to start somewhere, in whatever they do, and with writing, maybe that means writing a cringe fanfiction novel about a game they played as a teenager.
Speaking of...