I'm a beginner. And I have just one fear. That I'll be ridiculed. I've found this culture hard to accept. Even opening public GitHub repo was strange step for me. But I realized latter that no one actually cares about my mistakes. Haters gona hate. So it was a hard start for me. Now I love it.
I think that they hide prices so that they can charge you the most that they find suitable for your use case. If you are an enterprise user off-the-shelf product is probably not what you need.
I try to keep it to a minimum, just a general ones about Python, Linux, etc. I've noticed that it is a rabbit hole. If I stay to long on Reddit I lose track of time.