How can I improve my workout regimen?

I'm a 23 year old female at 5'4" and 160 lbs. My ultimate goal is regaining the strength and flexibility I had as a dancer, and I'd also like to get back down to 120 lbs in the process. I had shoulder surgery this past June to repair a torn labrum, and I'm still working on getting it back to full strength and flexibility, though it has improved immensely over the past 7 months.

Current exercise:

Per week, I do about 3 hours of pilates and 6-8 hours of yoga, including 3-3.5 hours of relatively intensive Astanga Vinyasa yoga. I know I need to add cardio back in, but I'm just sort of getting used to this routine for now.

Here's the question:

Apart from adding cardio, what should I do to improve my overall level of fitness? How much weight training would be appropriate given the fact that I'm already doing a fair amount of resistance training using my own body weight? What muscle groups would be the most beneficial to work on? I do not have access to a gym and can't afford a membership at this point, though I do have some dumbbells at home.

I know weight training is important to achieve and maintain desirable body composition, I'm just not sure how to incorporate it with what I'm already doing. I'm only asking about how to improve my exercise regimen, as I have already looked at my diet and made improvements where necessary.

Thanks for any advice, I appreciate it!