<human>: I've decided to hop onto my husband's gym membership on Thursday. I am a 27 year old female who has always been somewhat overweight but I have really put on the lbs. (I weigh 280lbs.) over the past 4 years due to injuries from a car accident that wasn't even my fault. :/

I've gone through extensive physical therapy over the years but nothing has made me able to be physical until I recently received two epidural injections in my lower back to help with the pain of my bulging discs. 

I've tried little cardio workouts at home and even use the elliptical sometimes but I end up not sticking with it because just the little bit of physical activity I did makes my back hurt so bad. I know I haven't injured anything, I just think it's because my body isn't used to exercise.

The gym's pool is closed until May so my preferred method of exercise is not an option for me at the moment. Does anyone have any advice on how to get started at the gym? 

I mostly want to ask people who have been significantly overweight and have been in my shoes and understand the pain and frustration that comes with exercise. But, I'm open to anyone's advice.

Can you summarize the given text in a few sentences?
<bot>: I am 27/female 5'6" 280lbs and need advice on what gym equipment to use to help lose some belly fat and strengthen my fucked up back!