All of these are unknown but the bb seems to be a fish. The button i dont know except that he isnt hid from player search and played 2 zoom tables.

Overall i think there is a not very small chance that the BU will have a decent portion of AA as his range.

I basically am unsure about every single action i did in this hand. I kind of like the flop check because i obviously am scared of a or k hitting the turn, but i think i need to give the bu the chance to bluff and if he doesnt i need to give bb the chance to jam overpairs and whatever hands he might have.