There are some ready to run RC that have a training mode switch on radio to allow new users to learn how to control them b4 turning 100% power on..and some remotes that allow user to set endpoints on Throttle to do the same thing...I like recommending the traxxas slash to new 1's as parts are...
No dont think about using a Nixx charger on a lipo you will end up burning stuff down...get a designated LIpo charger...do you have a 12vpower supply?.. Id also readup on lipo batteries there not like NiCad or nimh...also get a lipo bag.....a lot of people like the Hobbywing esc motor combo I...