The best way to kitty proof your home is to lay down on your stomach in each room and look around your carefully. See any dangling electrical cords or cables? Measure the distance of the exposed cords and you can either buy PVC pipe and slip the cords inside, or take a slab of wood and electrical tape and tape the cords down to the board.
Do you see small areas like behind a heater, or back behind the entertainment centers where a kitty can hide? Plug those up. Can kitty get back behind the refrigerator? Is under the sink safe, are your cleaning agents and other chemicals safely put up?
In the bedroom if your dresser has just the smallest amount of space underneath it, plug that up as well. Let her or him get under the bed if they wish.
Buy a scratching post or cat condo right off. This way she can exercise and run up and down while you are at work. Put it by a window if you can, so she can look out and watch what is going on outside.
Leave music playing in the background while you are away at work. Classical music works best. Make sure you have all your houseplants checked out before she gets here- many common houseplants are toxic. here is a pretty comprehensive site for that:Amby's toxic plants
In your bathroom, just be sure the toilet lid is down, and there is nothing on the floor the kitty could get into and get in trouble. Vitamins that drop on the floor and you can't find, that type of stuff.
Provide her with plenty of toys, and when you get home from work, make it quality time with her by playing with her, grooming her, petting her etc...
Cats are very social animals, the only time they really like to be alone is when they hunt, or when they are ill. If you get a small kitten, she or he will miss the siblings and the mom, so if you can I would think about adopting two of them. I would also try the Persian Rescue Groups, because they have so many lovely cats that need homes, and yours sounds like a good home for their needs.
Good luck, whatever you decide.