Hi, thanks for posting in the forums! It really is a better way to learn than just reading.

Start with a larger 3-bet. KQ should be in pretty good shape against a CO opening range, which means Villain will be forced either to fold often to your 3-bet or to call with hands weaker than KQ. Those are both good outcomes for you. Against an extremely tight opponent, I'd fold this, but 3-betting should be your default. Just use a large size, because your raise gives your opponent a good price to call with any hand, so he'll never make a mistake against you. I'd raise to 240.

The flop sizing is fine. You shouldn't assume that you made a mistake just because you didn't get the outcome you wanted. It's quite possible that your opponent just had a hand he wasn't going to fold, even if you bet 300 or 400.

I'd fire again on the turn. You have a lot of equity against your opponent's range, which will consist of Ax (ahead of you, but not by a lot, especially if he doesn't a better club than yours), medium pocket pairs (you're drawing to 14 – 15 outs), and maybe some worse draws than yours. I don't expect your opponent to fold often, but you don't need him to because you have so much equity even when he calls.

As played, I think it's worth betting something like 300 on the river trying to make your opponent fold Ax. If he's very loose, then checking and giving up is fine.

You're welcome. I actually misread the hand a bit, thought Villain had raised rather than limped. Against a CO open limp, this is an absolutely mandatory raise (he probably raises the only hands that dominate you), and you should raise a bit larger than I suggested, like 280 – 400.