Good exercises for cardio, but also weight loss?

I have been trying to loose weight, but when I do any kind of exercises I get just plain tuckered out (I have a heart condition, not just that out of shape). So I am wondering if there are any weight loss exercises that will also do good for cardio?

I would like to loose weight, I am currently only about two pounds overweight but would like to loose about 10-15 pounds. If you know a routine that would do good let me know. Currently I am doing Strength training Monday, Wendsday, and Friday. And Cardio on the other days. I am wondering if I should cut the strength and do cardio all the time. I am a female, 5’5″

Thank you all for you time

Good weight loss exercises for a 15 yr old?

I’m 15 and I need to lose weight. I’m 14 stone and 5ft 11, which makes my BMI 27, which is overweight.

I’ve been doing quite a bit of research and I have a good idea of what to do diet wise but I am a bit clueless with exercise, so I need help/tips. I am looking for:
Exercises I can do in my bedroom at night (press ups etc. and I also have 4.5kg/10lbs, 2.3kg/5lbs and 1.1kg/2.5lbs dumbbells)
The best thing I can do for weight loss at the gym (I go once a week)
and also any other exercises/simple things I can do.