You probably also call too much, bet/raise too little. For example, are you familiar with the values of wrap straight draws and how they stack up to made hands? If you started in NLT, you most likely slow-play way too much as well, flopping a set in NLT more often than not means that the money will go in at some point in the hand, but in PLO a set is not as valuable on later streets (depending on board texture, action etc of course).
Especially at lower levels you want to get as much money in when ahead as possible, so you should be raising/betting your good draws and made hands hard.
Also, when starting out, play hands that have the potential to make the nuts and/or flop huge draws. Make sure the cards in your hand connect well, do not play stuff lite KT62r.
And remember to have fun, especially when the stakes are so low