Me thinks Starboard is the one as he puts it above that is "cocky, arrogant, and can be pretty abrasive"
I am not DIR but have been curious about the system of gear and school of thought. When I talk to "DIR people" they tell, me that if I can find any other "DIR people" in the area, to work on getting my basic skills solid and form good buddy skills and to find a diver that I think is good diver and have them mentor me even if they are not DIR, I have been told an old salt can teach a newbie a lot.
So here is my advice as a newbie moving toward tech deep diving. Get good OW training. Practice, practice, practice the skills. Dive, dive, dive, and dive some more within the limits of your training. Then get some more training and repeat the above practice and dive routine. Then get a little mor training and repeat the above.
Anybody can dive deep at anytime any day--what sets the trained divers apart is that they can return to the surface alive with no injury after they reach depth. Even with training and good plans, things can still go wrong.