Andy I have just recently completed the PPl at Liverpool , welcome to the best thing a person can do in his spare time . The best advise I can give you is Continuity. Try and be as frequent a flyer as you can be and dont worry about trying to get a PPL in 45 hrs . This is possible but at the end of the day if you do struggle on something ie nav you may need a few extra flights trying to get it all in inside 45hrs will just stress you and make you nervous . Obviously the longer you leave it between flights the more revision you will have to do during the next lesson and the longer the process will be . Never be afraid to ask questions if you dont understand then ask make sure you know everything you can about your new steed cos in a few hours time youll be at 1000ft , get too hatches and harnesses on your pre landings look across and there will be no one there . Im sure everyone here will agree that is the best feeling in the world but when you suddenly see your oil temp in the red and the pressure buliding you may be thinking "bugger" . And as has already been said enjoy every minute of it dont let nerves affect anything , your there to enjoy yourself .
I have taken up four friends since qualifying and to watch the look on their faces after takeoff is worth every penny
good luck and enjoy
P.S get your ground exams out the way as quickly as you can the flying is a lot more fun if your not worrying about exams