[lsiebert]

The practice of writing is, in fact, about practice. It is a craft, and you need to work at it. Writers have peer review workshops (like Clarion https://en.wikipedia.org/wiki/Clarion_Workshop which is for aspiring scifi/fantasy writers) they have editors who know how to make a good idea better, clearer, etc.

Don't worry that your writing isn't great. Get the ideas out, hammer out a story, don't prematurely optimize. Refactoring is something you'll do later. But definitely write every day, or at least sit at a desk. You won't know what to start with... If you are idea based, you will probably lack for characters, plot, scenery. Don't worry, you can work on that as you go.

But fundamentally, write, then write, then write some more.