I have no business in this game 10/10 live

[HOWMANY]

So this is a 5 handed 10/10 $2k max live game. The player on my right is an expert an has $a lot in front of him. The other 3 players all have about $1000 so I buy in for $1000 because I don't know how to play NL so covering the people that probably aren't good seems to make the most sense. The villain in this hand does not seem very good to me, I have seen him call a ton of raises both in and out of position and not really do anything postflop. I have been at the table only a few hands. I opened my first button to $30 with whatever I held and took it down after the sb called pf with a $50 cbet. After another orbit or so it is clear to me that $30 is probably not the best amount to raise, so the next hand I have AK UTG and open to $40, flop goes 5 ways K56r and I take it down with $170 cbet. The villain in the upcoming hand says something like "why so much?" I'm not sure what this means but I tell him I'll bet $10 next time, which is a thinly veiled and not very funny joke that means I am a minbet player.

So the hand:
Effective stacks close to $1200. Villain open limps in the CO after a fold. Good player in the SB checks. I have K[img]/images/graemlins/spade.gif[/img]K[img]/images/graemlins/diamond.gif[/img] and raise to $50 in the BB, villain LRR to $130 total. SB folds. I make probably my first mistake in the hand and call. If I should 4bet how much should I have 4bet to?

Flop: Q[img]/images/graemlins/club.gif[/img]J[img]/images/graemlins/club.gif[/img]6[img]/images/graemlins/diamond.gif[/img]
I make another mistake (?) and bet $250. Villain makes another comment about how much I bet and then raises to $600. I wish I raised again pf or knew how to play NL postflop and then fold. Was my donk on this flop okay? If the donk itself is okay should I have bet less like 160ish? If I check what is the plan?