I WANT TO LOSE WEIGHT. Any help? opinions?

I have been dying to lose weight. I can't come off the patch because it is the only method that works for especially since my boyfriend and I always have sex. I don't feel comfortable in the gym. The park near my house has too many rape issues and there's over 210 sex offenders in my neighborhood. I'm 17 years old , I weigh 182 now since i started the patch, but before the patch, in 2015, I was 135. I really need to tone my legs and stomach , any suggestions for at home work outs without bringing on an asthma attack? (p.s I have chronic asthma)