Welcome to Medium! You're going to make loads of mistakes, but stick with it - it's a sharp learning curve and it's important not to get disheartened.

There are going to be downer moments, but if you've got some interesting things to say and an engaging style, you'll find your audience quite fast.

Another thing that's important, if you measure your success financially is to consider that success doesn't always mean ONE big article that goes round the world (though that can help) - it's having hundreds of articles making $0.20 a day because you've snared a loyal audience of readers. It's a slower build, but no less financially valid. Hopefully you'll have a combination of both kinds -and enjoy the ride :o)