aight unlike everyone else I don't really have a problem with loose play preflop. Well the thing is alot of the hands that people say play tight and wait for "this" hand and call I would raise it. The Big thing that alot of people that come straight from hold em fail to realize with regular PLO is that CONTINUATION BETTING IS NOT AS EFFECTIVE. Of course this only applies if your raising preflop, something I do a lot, but it takes discipline to raise preflop on the button and check when you totally miss the flop in omaha if you just came from hold'em. So its cool to raise but you CAN NOT fall in love with continuation betting its only good for the image you get for when you actually hit the hand, not as good for picking up pots as in hold em.
Another thing with this type of table you explained, YOU CAN NOT TRY TO WIN EVERY POT WHERE YOU FLOP THE NUTS. This is kinda hard for me to explain. The point is your at a calling station, and in omaha the flopped nuts usually won't be the nuts by the river, so sometimes you need to take heed of this and play hands safer in certain situations. For instance lets talk about, say, set play for second. If the flop comes uncoordinated and you have the nut set, yeah this maybe a good time to bet pot max or checkraise pot max.
Now this situation is different when the board shows a straight and flush draw and you have top set, yeah your hand is best but you can best believe your gonna have callers when you bet pot. If the pot was big on the flop and your hand is still best on the turn than you can probably scoop on turn, but if the pot was low and you pot maxed on the flop and you still lead on the turn a pot max bet may not be the best thing because you might not be able to get them to fold and when the draw card comes on the river you put more money in than you wanted to on a draw heavy board. If you know you can't scoop on the turn than I like to value bet/half pot bet here because you save money when the draw does make it whether you call the river or not.
PLAN YOUR PLAY AROUND THE TURN. If you do this in PLO, you will have much better results. I don't care what anyone says, we can argue this all day, the TURN is the most important street in omaha. This is the street where most nice pots are scooped and where players take control of the pot. Its also the best street to bluff. Now everyone says not to bluff, and in your case I wouldn't bluff because bluffing is like a form of art in omaha, and you definitely can't do it as much as you can in hold em, ESPECIALLY IN A FULL RING GAME. Most of the time, if its 5 or more people in the hand you shouldn't be worried about bluffing. I happen to bluff probably more than the average person in omaha, but you HAVE to understand why you bluff and what your trying to accomplish with your bluff, Plus have good reads on everyone.
Just take the advice of playing tight, drawing to the nuts and not bluffing if you just started. You need to learn the basic principles before you start doing other stuff. Learn to count your outs and Learn to fold. Don't put yourself in positions to make big lay downs, or in other words pushing marginal hands to the edge and than your opponent tries to push you off the cliff with a large reraise. OH YEAH, PLAY SMALL BALL POKER WHEN YOU DON'T HAVE THE NUTS WITH GOOD HANDS.
Last little tidbit, before you automatically bet pot max post flop, click the pot max button to see what it actually is, than ask yourself if it is enough to make people fold, if you can't say yes than think whether it is worth it to bet pot max if YOU know for sure you'll get called. At the type of table your at, the more you bet pot max, the more you make it harder for yourself to lay down your hand when that flush or straight comes that beat your set, because you'll feel a sense of being somewhat pot committed as a beginner.
But let me get this straight, YOU WERE UP 600 at a 1/2 omaha table and you didnt leave??!!? Seems like a situation where you should leave and rebuy in for cheap. Problem I tend to have too, but if that was the case you DEFINITELY should've got up out of there!!