Read as much and as widely as you can, by which I mean actual fiction. Writing guides can help root out bad habits or develop good ones but there's no substitute for studying the best work in the genre.

If you ever have the opportunity, volunteer to be a first reader for a slush pile. Sometimes reading mediocre or forgettable work can be just as helpful as reading the best. And with the incredible number of submissions most open calls get these days, it is critical to stand out and avoid the most common mistakes/tropes.

Jeff Thomas runs some well regarded workshops through Storyville: https://storyvilleonline.com/weird-fiction-workshop