Hello and welcome! Only be here "for a while"??? Let's make that a looooong while, ok?
I do not have any specific threads to recommend, but I would say start in the Regional/World Mapping threads (obviously) and you'll see a lot. If you want specific tips, go to the tutorial section; for examples of great maps to emulate, see the reference sections.
Also, if you tell us what software (if any) you plan to use, that would be very helpful too!
Once again, welcome!