Check the Meta section over at:
https://bitcointalk.org/index.php?board=24.0There's plenty of guides over in that section, and links to the rules. Alternatively, you can use the built in search function for anything specific that you want to know about the forum. Otherwise, use a search engine with the parameter "Site:Bitcointalk.org" <search query>.
Honestly, you'll learn a lot as you go along, but navigating the forum, and learning the rules is a good start.
How can I do bitcoin mining?
Checking the mining section. Mining support, if you have any specific requests regarding your hardware, and how to get started. Do note, that mining Bitcoin on GPUS is pretty redundant at this point.