Lotta good advice on this thread. Weather has such an impact on GA flying, especially in fall and spring with frontal passage. You hafta be alert and flexible as predictions change frequently and even rapidly, requiring on the go adjustments, mid-flight. And unlike a car, you can't simply pull over to the shoulder, or rest stop, while a storm passes you by! You must expect the unexpected and be able to respond accordingly. As mentioned, high performance airplanes (turbocharged, constant speed props) that mountain flying almost demand, require even more training to maintain proficiency and expense to operate. It's a very expensive hobby, but very rewarding at the same time. It does provide a certain freedom and independence but you pay for it handsomely! Ideally, if one can incorporate it into their business, then it's a no-brainer!
My advice is to hammer out your ground school as soon as you can, as that must be completed before you can get your license, and many put it off and end up finishing up all the required solo flights before the ground school is complete. Theoretically, you could complete ground school before your first flight. So knock it out early and you can concentrate on just flying, which takes a lot of concentration too!
And I heartily endorse your Navy instructor! Mine was a former Navy instructor pilot, who thought me "procedural flying", or doing everything "by the numbers", and the same way every time. He was a stickler for doing everything in its proper sequence, and on time! You'll not regret that. Some instructors are fairly lax, and allow students to fumble along any old way, but I preferred the disciplined approach that ingrained procedures that remain 40 years later. I suspect you will too! I haven't flown in 15 years, but still yearn to do so, and hope to buy a bush plane and fly all over Alaska in a year or two. Good luck!