Reddit is a huge platform, so you can find a subreddit for just about anything, certainly including writing. There are dozens of subreddits for writers, and there are subreddits for specific types of writers and not only for writers in general. The main general subreddit for writers is /r/writing. With more than one and a half million members, the forum is very active, so it has all the news, tips, and discussions you want. You can use /r/writing to promote your work and have people discuss it. If you are active enough on the site, you can find a network of writers to share ideas with. If you write essays rather than stories, you should look at /r/essay_helpers. You can use /r/essay_helpers to sell your skills to university students that are struggling with their essays. If you know how to write a good essay, people will pay you to write one for them.