@thomasfuchs I'd even say it's enough to just write a lot. My writing improved so much when I had the nerve to actually write. Make mistakes, re-read my work, do the next one better.
These days all I do is read about writing and I feel my writing has never been worse. No longer that feeling of "this is as good as I'll get it" and more often just "OK, I've spent too much time on this, let's just publish it in this way I don't really like".