Dave, welcome aboard! That is some reading!
With regards to your weight, you will probably find the Tommy more than adequate (as I do) and depending on the weight of your instructor - you will probably be ok, however, you need to think about the type of flying you will do when you get your PPL - I.e. if you want to take people, then you may need the lower restrictions of the Warrior for example (4 seater). Personally, I will be converting to the Warrior (or similar) upon completion, for when I want to take people up.
You sound like you have the right attitude towards the exams - you just need to make sure that you pass them all within an 18 month timeframe, and then (I think) you have 2 years from the date of your last exam to pass the PPL (someone correct me if I am wrong).
Best thing to do is go to your flying school and have a chat with an instructor - they should be more than happy to answer all your questions (and in my case, put your mind at rest to any initial fears). Where are you flying from?
Best of luck - look forward to reading your experiences (ahem)!
Lee
