Hey Husky,
I reckon the main thing for your wife to know is what we all learn - what seems difficult, or even impossible comes with practice. So, the right board for the longer term, might be a bit tricky for the first few sessions. But the balance and skills will come. I reckon I had more exercise clambering on after falling off countless times when conditins were tricky (or there really must be a sniper in the sand dunes

) than all the paddling and surfing.
It is definitely handy to have a board that fits in the car. Think about 2nd hand. There are some good ones on this site. And if you decide to demo ask the people in the shop where the best, most sheltered spot might be. Up here on the Sunny Coast it's all howling northerlies at the mo, but there are still a couple of pockets to escape the gale. I reckon you are on the money with something at least 9'5 and at least 30 wide. Much over 10'ft and it might get a bit weighty/unwieldy for the times your wife may want to put it on the roof... Where are you located? - the Breezers could probably refer you to a trusted no-BS dealer - or even a bargain board. (Just for the record, i'm an experience surfer and i am on a Naish Nalu 10'6.5 and i reckon it's as close as you can get to a great allrounder. I am an experienced surfer - about 87kg - and i love it in the waves for a mal style of session. And it's good on flatwater too. It's a cracker, and i'd recommend it - but it won't fit the average car...) Anyway - good on you and your wife and good luck. You will both love this sport. Cheers, Dave