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Perhaps take a look at https://libera.chat/guidelines/

I think it is about as varied as communications outside of IRC: there are different communities with different rules, which are sometimes written down and linked from the channel topic. Generally hanging around quietly for a bit may help to get a sense of any particular community's customs.

> Perhaps a better question, how should you participate (as noob) without getting Stack Overflow beatings, and show respect of other people's time?

As long as you adjust when people give you guidance (if needed), you'd be fine.

Everyone does something bad/ill accidentally every now and then, it's not the end of the world, apologize, learn and move on. It becomes a huge hassle for everyone involved when it's repeated even after being told it's wrong, so just listen and follow what others (ops) tell you.