How do I get better at writing?

The way to get better at writing is to write.

I would say that's part of the way to get better at writing. But I'd add, to paraphrase Stephen King from On Writing[1],

"To get better at writing, write a lot and read a lot."

Granted, King was speaking mainly to writers of fiction, but I think the advice holds just as well for technical writing or anything else.

[1]: https://www.amazon.com/Writing-10th-Anniversary-Memoir-Craft...