Same scenario this time i didn't shoved instead i reraised, villain calls. I place a continuation bet on the flop, villain shoves, i fold. Lost 20% of my stack. This is the scenario i'm trying to avoid and i'm most afraid of, that's why i'm shoving preflop.
Being "afraid" of postflop play is not the way to become a strong winning poker player, so this is definitely something, you need to work on. And while losing 20% of your stack sucks, it sucks a whole lot more to lose 100% of your stack, when your preflop jam with AQ is snapped off by KK, which then hold. As for the hand you shared, it was not a great texture to C-bet, because its very coordinated, and it connects with a lot of the opponents range. So you could just check and make decisions depending on, what he then does. Not auto C-betting in bad spots like this is one way to improve your postflop strategy.
Also your preflop 3-bet seems to have been very small, since the pot was just a little over 11BB. And this is not great either. You want to go to around 3,5-4X from out of position, because otherwise you price people in to call with their entire range. And then you are basically just playing a more bloated pot out of position with a hand, which miss the flop 2 out of 3 times.
You can also simply call with AQ, since you are in BB and closing action. Thats a little on the passive side, but chips are power in tournament poker. So attacking the chipleader out of position is a bit like seeking out the biggest and meanest looking boy in the schoolyeard and provoke him to a fight. Not the smartest thing to do, if you are skinny little kid yourself, so in this exact spot I would just call preflop and then go from there