One of the best things you can do to improve your writing is to look at other people’s work. Offering to edit other people’s stories will open you up to your own mistakes, other styles, and make you more mindful of what a reader’s reaction is likely to be.
When something looks wrong in someone else’s text, it’s a lot easier to spot.
I personally have a set of blinders up on my own writing. I don’t always see what’s missing or how a phrase is jumbled rather than clear. But sometimes I spot something wrong in someone else’s draft and that becomes something to look out for in my own.