Ok everyone, I've been going to a club for almost 3 months, 4 times a week, for 1-2 hours and my techniques thus far are pretty good and I pick up on them quickly. However, when I roll, I generally last very long because I have good defense, but off the start I can never achieve a dominant position, I ALWAYS seem to end up on the bottom of side control, or mount, or north south. When they take mount I can usually always roll them over into their guard, but then they just get their legs in, and push me off, and then we're back to square one. I always feel as if I'm just getting pushed around by guys bigger and stronger than me, even though half the time the guys are the same size as me. Any tips?