> And while I'm comfortable writing in English, I'm not a native speaker and it probably shows. Getting from alright to good is a lot of work and the bar is extremely high

For what it's worth, at least from this comment, I don't think I'd have any way to distinguish your writing from that of a native speaker (as a native speaker). I'm also not sure that mastery of English is the most important skill of a novelist. Obviously I'm just a random commenter on the Internet, but I don't think you should let English being a second language dissuade you. Might even be an advantage if it discourages you from using flowery prose.