If you want to know if your writing is any good, and also get valuable feedback on how to improve, there are numerous writer's groups available online. I have belonged to several over the years. Which one will be a good fit for you will depend on what kind of writing you do (sci-fi, mystery, etc) and also your personality, how much time you can commit, etc.
Just one example is Critique Circle. It is pretty big and active and accepts a wide variety of styles of writing, so it might be a good place to start.