Double Barrel bluff on 2NL?

Hi~ omote here xD
As I playing 2NL MSS. I usually miss the board (e.g AKs and flop is T 9 2 rainbow). I usually C-Bet here on any situation, however, If opponent calls down my C-Bet, I feel confused. Should I give up this pot? Am I pot committed?(If it's 3bet pot), Should I All in (or raise if not 3bet pot) on 2nd street regardless to turn card?
Especially, If I CBet and opponent calls and I checked on turn and opponent bets, I feel despair, because I can't distinguish float play, bluff etc.... If I feel that opponents is trying to 99.99999% float, what should I do? Still fold?...

I post this thread because I think bad double barrel and C-bet is my one of the biggest leak, (Another one is lack of detect opponent's set,trips)

Unless you have a specific read, your default play should be to Cbet the flop then check/fold on the turn. If you do have a read though that your opponent is a "lookup artist" (someone that floats you on the flop to see how you react on the turn), then you should make a note on this opponent and adjust your play accordingly (by either barreling turns more, or by Cbetting flops less).
EDIT: Also, if your opponent is a lookup artist, then you should seriously consider checking the turn with overpairs to induce bluffs, so that your opponent realises that Cbetting the flop and checking the turn isn't necessarily indicative of a weak hand that missed the board.

You can’t rely on bluffing to win.
If you’re making most of your money bluffing, you’re probably in the wrong game. Sure, there are exceptions. A few players may be so easy to bluff, particularly in no-limit, that they supply the majority of your profit. Fine. But that isn’t the norm. In the real world of poker, most weak and mid-level opponents have one great fault: They call too often.

Most of your profit will be made by leveraging this weakness. Strive for extra money by helping opponents exaggerate the mistake they’re already inclined to make.

What if you try to win by bluffing, instead? Then you need to condition these weak opponents to not call so much. You’re already making money because they don’t fold, but now you need to change that. In order to turn them into bluff targets, you must move them in a direction contrary to their nature. So, first you must herd them along the spectrum until they’re calling just the right amount of time. You can’t stop there, though, or they’ll suddenly be excellent opponents, supplying no profit.

Now, you must move them even further to where they don’t call often enough. There! Now, you can bluff successfully. But let me ask you a question: Doesn’t that seem like a lot of effort – trying to change players who are already giving you their money by calling too much into bluffing targets? You usually won’t be able to accomplish that miracle, because most opponents want to call. But even if you are successful, why do it?

Yes, you can bluff occasionally in specific situations, even against opponents who usually call. But don’t expect bluffing to be your main source of income. Opponents came to call. Take advantage.

109x boards hit calling ranges fairly well, like others have said, this would be a cbet and fold, sometimes I just give up, if I don't feel like I have a floaty opponent and likely not much equity. Its nice to be able to win everyhand, but it isn't possible.