Most houses need to be adapted before a wheelchair can reasonably be used in them. Especially bathrooms often need to be rearranged or enlarged to accommodate a wheelchair. "Big" and"power wheelchair" kind of go together.
The wheelchair should fit you perfectly. Accept nothing else. Your Q6 Edge can be adjusted in many ways and various seating parts can be swapped out for ones that fit you better. If they wheelchair cannot be made to fit, insist on getting one that does.
Your ATP and physical therapist should be able to measure you and identify what adjustments need to be made. My first wheelchair fit me amazingly well when it arrived. Still, over the next week or so we spent quite a bit of time fine tuning the fit even more.
I have tried several mid wheel drive wheelchairs and all of them suffered from caster jerk. For that reason, I decided to only have rear wheel drive and front wheel drive wheelchairs.
Of the mid wheel drive wheelchairs I have used, the Q6 Edge had the worst caster jerk and was very difficult to control. It suffered from tremendous caster jerk when the outlying caster wheels would need to switch direction. It would have been hard for me to use in close quarters, such as indoors.
Kim is right about wearing shoes with stiff soles. After a couple of years of wheelchair use, I developed a sore toe. It turns out I was running into things (typically doors as I was approaching them to open), and I was folding back the front of my tennis shoes (I wore them because they were light). The physical therapist encouraged me to switch to stiff-soled shoes, which I did. It has been a great improvement.
You might also encourage those around you to wear steel-toed boots as you learn to drive
. I was a bit of a hazard as I first was learning to drive my wheelchair!
Steve