How to Get Better at Writing?

The best pieces of advice I got about this were (I think these apply equally well to technical and nontechnical writing):

1) Write a lot. At first, write without any intention of showing it to others, and without any judgement about how good or bad it is. Just write.

2) Sit down and analyze examples of good writing and what techniques/habits they employ.

3) At first, emulate the style of authors you admire. Your own style will emerge later.

4) Recognize that most of what results in a piece of good writing is good editing.

It was in the context of writing fiction, but Stephen King (who knows a thing or two about writing) said - in his book On Writing - something like "the best way to get good at writing is to read a lot and write a lot."

I'd actually recommend reading that book, even if your interest isn't fiction (and definitely if it is). There's some good stuff in there.

Read a lot... and specifically people that are good at writing.

Read all types of books, not just what you gravitate towards. Study the language. Understand your audience. Learn new words every day.

Maybe use grammarly to find any common mistakes you make?