Root Root help

i need help. i rooted my phone because i needed tether, but now im interested in the other cool stuff like OC, kernels, and roms but need help understanding this stuff. is there a thread or a website to learn what these things are. i want to know how to handle my phone and not just follow steps. i have a bunch of these apps that require root, but don't know how to use them very well. thank you sry for being such a noob. back to playing counter strike :)