You don't say whether you are flying a C152 or A380, but I'm guessing nearer the former?
Four lessons is not all that many, it takes a long time to learn to fly - about 45 flying hours to master a PPL.
The circuit is the basis of a lot of flying. It might seem to be taking a long time, but lots of more complicated stuff leads on from circuits.
Try walking the circuit. Actually walk around your garden or a field in the pattern of the circuit imagining you are flying. At each point of the imaginary circuit: what speed are you looking for, what altitude are you looking for, what checks are you doing, what configuration are you altering, what attitude are you setting, what engine settings are you making, what radio calls are you making, what will you need to do next, etc., etc.
Good luck !