nice looks like an old duratrax Maximum MT, if that has the DTX .18 it is made by os and are some great easy tuning engines. the torq engines were decent as well, think they were based off Toki engines.
i really recommend checking out a lot of videos and guides for tuning, JQracing on youtube has a great guide, it is 1.2hrs long, but a very informative guide. there is a really good flow chart here as well. also really recommend checking out "Ron Paris's Tuning Bible" gives really good information and explanations of what is going on. key though is getting some experience, everything sounds good on paper, but doing it yourself is the key part.
biggest things for being new to nitro is ASK QUESTIONS, there are no dumb questions! and patience, nitro has a steeper learning curve than electric, but once you get it figured out, is just as easy.