Cool. The only way to get this right is to get your hands dirty and actually do the calcs and write down the equations.. Keep posting your equations here, we'll have a look and help you if you have difficulties or questions, and we can correct if you made mistakes.

Actually doing the math is a very good way to develop "in play" intuition. With experience, you'll often be able to tell at a glance whether a choice is +EV or not. Look at the top players: lots of them are number freaks (unfortunately for me, not all number freaks are top players...)