Hi I'm new to playing and studying poker and I have a question. If I have a straight on the flop, cbet and get a call from 1 player, and then the turn brings a flush.(with no chance to improve my hand str, I have no blockers for the flush). I did try out propokertools and it said that villain should have a flush there ~53% of the time. How should I calculate/think about how often I should call a turn bet and an eventual river bet? Sadly I'm nowhere near a math-wiz hehe so looking for some help/someone to point me in the right direction..

thanks