Twice a week is great, the more you fly the more simple the routine becomes.
I know how it feels, but just relax and enjoy the journey, you clearly want to fly so enjoy being in the aircraft.
There's no need for a guide, read up on the circuit in the flying manual, and then apply it. Climb at 80kts, turn left after passing end of runway not above 15° bank, climb to desired height, anticipate level out, let speed settle, reduce power, TRIM!!! (A correctly trimmed aircraft makes life a lot easier) Turn left over your turning point,radio downwind, repeat clearance, checks, BUMFLICH, turn left at base turn point, descend to appropriate height, reduce speed,trim flaps, turn left into final. Radio in, repeat clearance, next flaps. Land.
There's nothing in the chain you haven't done or are not capable of. Just enjoy it and enjoy the landing. You are doing what a lot of people dream of doing, enjoy it and relax!