Hi! For me, my fitness journey started at age 28, 258 lbs, and 5'2". I started by counting calories, drinking water, and walking 15 minutes 3x/week. My right foot was shattered and that was all that I could do. Over time, I worked up to doing my trusty Gin Miller and Kathy Smith videos. As I outgrew those, I discovered Cathe on FitTV. I started by ordering Rhythmic Step. Man, was that over my head!!! I quickly learned that the beginner's rotation (its a sticky in the rotations forum.) starts where most other instructors' 'advanced' leaves off.
Tell us about your fitness goals, and it will help us steer you in the right direction. Also, what did your body do that 'betrayed' you? What happened? We may be able to help in that arena too. I've had some issues with estrogen dominance, PCO symptoms, and endocrine issues since I was 18 months old, I might be able to help or at the very least offer sympathy.
Since you are 'perimenopausal' and have little energy, you might get tested to be sure that you don't have a vit. D deficiency or your thyroid is compromised. In any event, I would recommend trying some coconut oil (I prefer the Spectrum brand.) I like it in my morning oatmeal. It helps support the thyroid, and without a happy thyroid we all feel run down and lack luster.
If you haven't tried one, you might want to do an elimination diet to find out if there is a hidden food sensitivity which is causing low grade inflammation and exhaustion.
If you are having any digestion problems, you might look into adding some lemon to your morning water. That can help with any kind of indigestion you might have. Without good digestion we always feel lousy because we are inadvertently experiencing all kinds of vitamin and mineral deficiencies.
I hope I didn't wander far too off on a tangent

,
Alisha