Hand them over to Elon Musk, so he can sink them

There are things like grammarly to help you with your grammar (and a tiny bit of style)

Many writers and copy editors have YouTube channels and tiktoks with tips and tricks. For example, you can look for how to show instead of tell on YouTube and you’ll see a few.

Brandon Sanderson has a whole bunch of them on wold creation

If you decide to ‘train’ with fan fiction, you can give wattpad a try to publish your stories and see how people like them

If you enjoy it, you absolutely should.

If you think you may want to publish a book, there are also a ton of resources (free) online to help you write properly. World and character creation, style, etc… It’s very different to write just to enjoy putting your ideas down, than actually building a novel or screenplay.