Welcome to the forum!

As noted, if you have experience with model RC cars, the Beetleweight category is probably a good place to start. The speed controllers and such from RC cars will go in BWs no issue. I did try running a FW on those types of model speed controllers but it often overstretched them to the point of failure. Most, if not all events are fights of various descriptions. The Antweight class has been known to do non competitive things like football and so on but in my experience, I've never seen it happen in the heavier classes.