Well from what you're saying it seems you like grappling/ catch wrestling/ BJJ and such. i recommend you go to any of the gyms there and see if grappling, catch wrestling, BJJ, judo, or sambo is a one of the more popular styles there. I would also recommend that you pick a gym that has at least some muay thai / kick boxing. since cage fighting does use alot of strikes.
I myself am very similar to you. i used to be obese (over 30% body fat) and slightly overweight (i had no muscle basically just fat, so i didnt look too huge). and i dropped from 168 to 125 while getting 3 inches taller. all thanks to extreme high school wrestling team practices we had every day. i now jumped up in weight because ive been working out and so on. i myselfam considering BJJ, grappling, and muay thai. they are all pretty effective