You can start with this
PPL Training Syllabus breakdown (Excel Spreadsheet)...
It is a little out of date... as they have now added a "slow flying" component to the syllabus, so you'll probably need to allow another hour or 2... But gives you a rough lesson plan and some idea of how you would progress through to a flight test.
The legal
minimum is 50hrs (40hrs for a restricted ie. no cross countries) with a minimum of 15 Dual and 15 Solo... most people take around 55-60hours to complete a PPL. As for how long it will take you... Well, if you could go flying for 3hours a day, 7 days a week... it'll take you 3 weeks!! Of course, you'll need:
A. lots of free time
B. lots of good weather
C. lots of $$$$$
However, if you were to do a flight a week, you could reasonably expect to finish a PPL in under a year (weather permitting).
You'll probably find the biggest issue will be cost... I've just updated the
PPL Cost Overview for the
flying club I'm at... you're looking at around ~$12,802 for a PPL these days +/- a little bit depending on actual hours flown etc... Please bear in mind that is in a Cessna152... at AFC to do it in a 4 seater you'd need to add another ~$2,475 (ie. ~$15,300)
That includes, ground course + theory books, exams, medical, aips/maps, nav equipment etc... <insert usual disclaimer about prices being indicative only & subject to change etc>
My advice at this point would be to go an invest in a Class2 medical... that will at least give you the peace of mind of knowing that you can actually get one and will therefore be able to get a PPL. It'll be around $200-$250ish, assuming you dont need to fork out for hearing and/or eye specialists... but will save you a lot of grief getting it done first, rather than spending a couple of thousand on flying and then finding out you cannot get one!
Personally, I would hold off on the flying for now, maybe do a trial flight somewhere to see if flying really is your thing, as you cannot solo until you're 16... and flying really is a 'currency' thing... if you don't fly regularly (especially when first learning)... you tend to forget things and find you spend more time doing "revision"... which means more hours, which means more $$$$
One last thing... I'm not sure what AFS's policies on PPL's is... you'd need to ask Trolley... but I got the impression they were more of a commercial training establishment, being a flying
'school' rather than an aero/flying
'club'... and more focussed on doing integrated CPL courses etc...