Some Omaha basics;
If you are offered the opportunity to play either PLO or PLO8, choose the PLO.
In PLO you can still play the low cards, but when you hit those low straights, you will not have to split with a lower hand.
You must use 2 of you cards with 3 board cards.
Always read you hand top to bottom ex; 7532A or 87642. 8 highs are caution
hands in PLO8, especially when the 8 is in your hand.
Your dealt hand has 6 unique hands...AB,AC,AD,BC,BD,CD. On a 6 max table, each of those hands is up against 30 other hands....ducy? At a full 9 seat table, each of those hands is up against 54 other hands. Full table PLOx are getting harder to find tho, and rumors exist suggesting 9 max PLOx will disappear for lack of interest.
There are many 'best hand' descriptions for PLO and PLO8, split low cards in PLO are not good, while they play very well in PLO8. AAK2 double suited is a great hand in PLO8, while less so (still very nice) in PLO.
Remember you hold 6 unique hands each deal. Make at least 3 of them pretty good hands to play with before you absent mindlessly call every hand. Suited high cards would be one hand, connectors another, pairs another etc.
If you are dealt 888A.... fold. Terrible low hand, you can't improve to a set of 8's very often, and the only flop you will love is AAA, ok maybe AAx. A flop like 234 will more than likely lose you money.
Remember you must use 2 of your cards with 3 from the board. For the Hi/Lo version they need not be the same cards, but can be (hands like 5432A or 76543).