Hi there,
Don't be discouraged, you're out there, and that's the toughest part so good on you!
From the sounds of it, you definetely need an adjustment if you can't reach the brakes. This may help you feel more comfy on the bike. I'm not sure what the Pilot rides like with a flat bar option but having "drops" make you more aero like Bike Goddess said. But you can always ride the "hoods" for a more upright position.
As for getting basics on riding and hill climbing there are lots of material online, in bookstores, etc but to be honest with you, I think you'll gain so much more by continuing to ride and increasing your comfort level on the bike. I came from a MTB background before road riding and understand how you feel. My first ride was a loop around the neighbourhood and getting the "feel" of my bike. As I took the bike out each time, I learned a little more about how she handles. Maybe not now, but eventually I would seriously consider clipless. It will significantly improve your riding and climbing as well as you have the benefit of the pull and push with your clips.
I'm no expert and there are tons of experienced riders on this forum who give great advice. But all I want to say is keep riding, you're doing great!!!
All limits are self imposed - Icarus