I'm not in hrt and I've noticed some good results with this even without weights although it may take longer. I do glute bridges x 50, hold one second each, but hold 30 seconds on the last one, 2 reps of 20 leg lifts each leg, 2 reps 20 kickbacks, the exercises with a broom handle on
this video, although I have a heavier metal pole... Also "The waist stretch" from that same video. If you're not dead yet you can get on an exercise bike for 30 minutes.
I used to do that three times a week, been doing daily lately though, occasionally switching it up with various other things that work the same muscle groups, and basically avoiding upper body stuff because I'm not on hrt and don't want to bulk that up. Slowly increasing reps on some stuff as I get more stamina too.
If you're also quite overweight like I am, you could do this with intermittent fasting, I do a daily 12-16 hour fast, exercise during the fast to basically burn pure fat, losing about 2lbs a week this way, but keep it under 1% of your body weight per week, if it exceeds that you need to consume more calories when not fasting to stay healthy... Of course you don't want to be losing weight if you're not overweight...
Figured I'd include one of the videos I switch it up with occasionally... She makes it look easy though...
https://m.youtube.com/watch?v=0uuegGiEHCM&feature=youtu.be