My 1st dog was a bichon. I would get a potty area, like a playpen outside, if you give her the whole outside to go potty, she will get a little distracted. Also try to find a good vet now. Get a collar, some chew toys, and get the food the breeder has been using. I suggest natures miracle, so if the pup potties on the florr, you can use that to get the smell of potty out.
You have lots of time yet...so do your research...and just try and stay patient until spring.... And don't worry about the potty training....some say Bichons are very hard to train...you just have to remember, little dogs have little bladders. Mine was real easy to train if you are consistant.