I just played this hand

got AJ no flush
raised
a few called (play money - people tend to call everything)

on the flop
J8Q rainbow

the guy on the left raised and I folded due to the Q

people called and so forth and on
the turn (no flushes involved)
3

he raised and someone called but since I was out of the game dont really matters...

The river turned up
J

He who raised won with
Q6

so I guessed correctly that he had the Q

the thing is - I wouldve won if I just had stuck with it

did I make the right call to fold on the flop ?
What were the odds of me getting a A or J ?

EDIT:
just so you knwo - I am a complete newbie