Hello boolio.
I can't comment on which airfeild you should fly out of, because i've never been to your country.
I feel the best way to manage your time whilst attaining your PPL is to fly as often as possible or at least once a week, the reason I say this is if you have large gaps between your flights you'll tend to spend quite a bit of time back tracking with your lessons, which in effect will start costing you more $$.
The high wing low wing debate, well I don't really prefer one over the other, there are pros and cons for both. I did most of my training on low wing and then flew high wings after my ppl. Up to you really.
But the main point is, have fun and enjoy.
Good luck
Knox