Welcome to the site! If you enjoyed one of Endmaster's stories, you'll surely enjoy his other ones (although I recommend you start with the shorter ones like Rogues before going through Eternal). Ninjapikta also has some awesome stories, both grimdark and not. As a general rule of thumb, you can always go through featured stories, because they're featured for a reason.
On the topic of writing storygames, fear not, because you can do so with 0 coding knowledge. All you need is to write and link pages together; however, I would recommend you learn at least a little bit of variables and scripting, because it can add a lot of depth to a storygame, especially if done well. Oh, and stay away from items.
That's all from me, so do enjoy your time around here!