The tolls are not expensive and I would pay cash for them.
Are there different lanes for cash and credit cards? How are the lanes marker?
The trickiest bit is indeed the lane markings. You need to look from far out and look for a picture of little man in a hat and NOT the card symbols. Occasionally there are self service ones which cause a mild amount of havoc - trying to reach the change.
But all in all nothing to worry about