ditch that interior...thats step one.
as for parts, the best deals are on the Nissan For sale page, or extra stuff that shops have laying around, driven concepts always has tons of extra stuff laying around, other good places are xat, enjuku, etc. You can find them in our vendor's section.
Next step... whenever you run into an issue that you need tips, tricks, etc on, just post it up, there's a lot of knowledge in this forum, but you gotta ask to get it. What are you planning for in the long run? daily driver with good power? drifter? dragster? Good luck, i love my nissans, there's always something else to do.
as for tr meets and stuff, i've never been, well, i haven't been since drift day 1, which i came across by accident