6 max online hero has about $750 to start the hand and is on the button.

villain ~$2500- is on my direct left and very aggro both pre and post but has shown down some odd hands in bad spots. like overpair that got potted on, eventually all in on dry flop and he sucked out on against top 2.

hero has AcJc7D4D and limps on button after its folded around. I limped because its very likely that i would be potted pre by villain in sb and wanted to see a cheap flop when finally having position on big stack at table.

villain pots to $18 and short stack calls from bb. i call as well
flop- $54-772 rainbow. villain pots $54 and bb folds. his range is obviously weighted towards overpairs but not entirely. i felt that a raise on such a dry board would look very strong, but flatting does as well i think. is the proper play here to flat against an aggro viallain?

turn ($162) As. i have the second nuts and villain leads out again for $118 and i flat again. (is this wrong)?

river ($398) brick. hero has about $560 left and villain leads for $280. im never folding and wanted to call but friends railing me who were more experienced in plo said to ship it and i did and obviously got snapped off by aces full in a $1500 pot. (just imagining this guy behind his computer laughing saying "aces full mike" in a russian accent.)
so just wondering where if anywhere did i do something wrong?
thanks

no matter what went wrong in that hand, dont limp the button in a 6max online PLO game.

Flatting flop looks way stronger than raising, he's not folding a weaker 7 either so put more money in on the flop.

Yeah def raise pre and raising looks a lot weaker too

my main concern is the river. am i supposed to ship all in there or is it rare that ill ever get called by worse and should simply flat call?

you should ship it on the river

also your main concern should def not be the river because your reasoning for preflop and flop aren't sound imo