In these kinda spots you should turn up the aggression. First of all, 3-bet it preflop, charge those donks that can't fold their K7's to 1 raise. 3-betting seriously narrows villains ranges, making the hand easier to play postflop. Low-stakes poker is all about making your decissions easier, to reduce your number of mistakes (in my oppinion). You're OOP in this hand, with a strong holding, don't let that many people see a flop, raise it up to prevent a crappy situation like the one you got yourself into.
Good flop for you, on a two-tone board. Here you'll want to find out who has a hand and who doesn't, lead this flop for 1$. The strength you show by leading into 3 other players should remove everything that isn't a flushdraw, a Q, a set or an OP. Either way, you'll get the information you need.
Worst card ever. We could be drawing dead already, and any additional betting will basically commit us. 25% of our stack is now in the middle and our options are limited. Either we have the best of it, or we don't. It may be weak to check/fold here, but I think it's the right play. What can you beat now?