I'm only about 6'. I'm not nearly as bulky as I'd like to be, but I'll get there some day.
I actually learned BJJ from a guy that was taught by Royce Gracie...needless to say it was intense. The thing I hated is he would make you spar him, and you were considered "good" if you lasted more than 10 seconds haha. One of the few good things about Lubbock is that a few of the 1048048035835 Gracies randomly come here and give seminars at the BJJ school. Muay Thai + BJJ is really unbeatable IMO. It's the best striking + the best ground work you can get ATM.
If you search around online you can find some pretty detailed BJJ instructions/vid clips for free. There was a good site I can't find now. I'll PM you tomorrow or the next day with it if I can ever find it.