MP is probably recreational player, BN unknown 2-tabler from east europe, on small sample his basic stats(vpip/pfr) are 'reggish'

I think both check and cbet are fine there as I also have all combinations of JJ and QQ in my range.

Turn is not best so I decided to check and opponent fired quite fast. I expect him to checkback mostly his AK there so I cant see any single value hand I beat from his value range excluding maybe draw vs slowplayed AA. Also I dont know what to think about his sizing, he should bet either very small or jam right?(second option probably prefered on this board). Calling is probably not an option as It will leave us with ~7,5$ stacks on 36$ pot on river, overall I decided to fold, but now I have second thought if it wasnt too nitty?