Best place is Online buddy-and google *maxbashing* its a great place like this but nitro based. I would also download of the hudy website the Hudy Offroad setup manual too-Tells you everything you need to know if you adjust this here are the + points and the - ones too.. Its free to download and is a great tool to read. But best bet is on line. And asking people to help you down the local track ect.. it wont take long to get the hang of it.. it will be good to stick with the RTR engine too=less £ if you do accidental kill it..and stripping a engine ect watch some of these-some usefull stuff for people new to nitro-
http://www.youtube.com/user/Squirrelod
Has 100's of vids that will be useful-stripping a engine too tuning to, changing clutch shoes ect..-Worth watching a few each night
But, best advice is online +the guy above..and other forums and sometimes youtube vids can be useful. Let us know how you get on