Bro, when you take a hit, it doesn't have to be amazingly big aye. A lot of smaller hits for me is better than a few huge hits especially if I cough like a mofo afterwards. You get higher if you toke up over time, like, smoke a bowl every ten minutes or something. Thats what I've discovered anyway..

Holding it in your lungs, when you take the hit, I dunno if your doing it wrong or something, but you could try like swallowing it then burping it up, that would guarantee you getting a proper hit I guess..