Welcome to the forum, you've got some great suggestions for getting started on the forum. just like you go to a school, of course, you will be informed about the school rules so you can study comfortably without violating the rules which of course can get you punished.
How do I commence my learning in the most subtle way?
I believe you should read more on forums. And if you're having trouble finding topics, I think you saw a forum search box that you can use. I'm sure it will be too broad for you, but if you take the time to read through it, you'll gain some decent knowledge.
I hope you will stay on the forum for a long time.