Stand up wheelchair needed.

Here is my story... I've been sick for the past 10 years with peripheral arterial and vascular disease. They finally decided to amputate this past October. I live alone and I'm finding it very hard.
I need HELP if you can...
I've been sitting here stressing on the things that I need to make my life easier and to make everything accessible. When I do get my prosthetic leg I've been told that I may only be able to wear it 6 to 8 hours a day at the most. If I can even wear it, I'm prone to abcesses and boils. This I won't know until I enter rehabilatation.
A lot is not covered under my insurance company because I rent my apartment.  Also would like to get a wheelchair that allows me to stand up to get around.  I also need a car topper wheelchair carrier.
Thank you for taking the time to read my story.