I don't know your current fitness level, but if you're not exercising now, I'd start with walking every night, six nights a week. When that becomes easy, try HIIT, alternating walking and jogging or walking and stairs. After a few weeks, I'd do the HIIT for 30 minutes and then add some weight training, alternating between upper body and lower body. And I'd also include some core training every night.
For some people doing aerobics so close to bed keeps them from falling asleep. I'm one of those people. I always reserve my weight training for the afternoon or evenings.