I think Aryana said it best. Do what makes you happy-- life is short.
My plane is a '63 182 with a PPonk, MT prop, wing extensions and a STOL kit. On big wheels I think it would suit your mission just fine. On amphibs, as it is now, it is modestly powered and I can't just push in the throttle to correct errors in judgement. Hence my philosophical disagreement with Hammer on what kind of plane to cut your teeth on.
I was 50 when I got my PPL, probably not as sharp mentally or physically as Hammer was when he was learning to fly a low-power plane in the mountains. When you are a low time pilot there is a metric shit-ton of stuff to learn and I think if you can push a few lessons back on the timeline it might just save your life. In the intervening few years I've been learning about weather, mountains, daylight, a lot about wind, fuel and weight considerations, judging strips from the air... stuff like that. It wasn't until this year that I went out with an instructor that started to school me on lift and ridge flying. No doubt I'm a better, safer pilot with that knowledge but I'm glad I didn't have to learn it first. Your mileage may vary.
As I said in my previous post, you'll never wish you had less horsepower but you very well wish you had more.
