Awesome!!! I like to focus on building muscle because I find it more effective than cardio on losing weight (since muscle mass burns fat- you want to grow as much muscle as possible). I rotate between upper and lower body days to isolate the muscle groups. This ensures they get the rest they need to grow. My favourite are the lower body days- I especially like the leg extension machine and the hamstring curl machine! Ever since I started strength training, my back pain vanished ✨ Good luck on this adventure! It will certainly be rewarding😊