Only thing I would say is that if you have the money saved, try to do it in one go or compressed as it saves time. By coming down every three weeks and doing a lesson, you will have forgotten more than you learn, so it will take much longer to get done. Granted, sometimes one needs to earn the money as one goes along, so then that's the only option. But doing it as fast as possible will be cheaper and more consistent.
High wing vs. low wing is the longest argument going. But I can tell you that a Cessna is pretty much the perfect training plane. And the cramped little 152 is cheap to train in and flies well and is very forgiving. You can screw up landings, stalls, approaches and it will never bite.