If you understand Holdem, lol, you are probably in trouble.
Each Omaha hand is the equivalent of 6 Holdem
hands, which means at a full 9 seat table your 6 hands are up against a potential 48 other hands (8*6), and at a 6 max table you will be up against 30 other hands.
Always remember that you must use 2 of your cards and 3 from the board. That is immutable.
Play as much play money Omaha as you can. Omaha is such a wide open game that learning as much strategy as you can for free can not hurt. Actually it isn't so much strategy as it is familiarizing yourself with what works and how often it works. If you play scared, then stay away from Omaha.
Beware that warm fuzzy feeling you think you have because it is pot limit and not no limit. You can lose a huge stack as fast in PLO as in NLHE.
Beware a paired board. Beware a flushed board and anytime the board shows a straight or a flush, you can side bet yourself that the straight or flush is a made hand in someones hand. The frequency that a paired board produces a full house is higher than 50% (I'm guessing) and bigger boats are common in Omaha.
Find a passive table and play aggressively, or an aggressive table and play tight.
Personally, I prefer the passive tables, I see a lot of flops cheaply. I also prefer PLO8 over PLO.