I may not be close to menopause, but I have felt my own subtle aging effects, as well as having to deal with some depression, and balancing work, life, and exercise.
On the energy standpoint... are you eating enough? I know this may seem counterintuitive when it comes to wanting to manage "weight" or fat on your body, it is also extremely important to your ability to feel like you have enough energy to exercise, and also to sleep! Sleeping burns calories, and as I've been learning recently, sometimes you can't sleep if you push yourself too hard, without enough food. I've felt fine when I go to bed, but toss and turn during the night, if I've skipped a meal (especially if I close at work, and just want to go to bed, but haven't eaten for 5 hours!).
Otherwise, hormones play a big part in our bodies, and how they work. See a doctor about your concerns, and talk to them about your energy levels. If this change (of energy) has happened without your lifestyle changing, you may need to look into some more alternatives to your current medication.
Depression is... difficult. It's not something that is easy to navigate, and it's not something that people often talk about navigating. Most of the time, people want to stick some drugs in you and call you better, because you feel better. But, in my experience, depression is a symptom of other issues, be they mental or physical. You may need to change your diet, your routine, your work, your self-care. You may actually need to learn to manage your depression in other ways, too. Many of the people I've talked to with depression indicate that social media, and sometimes news media and such, can be very difficult, and trigger a bout of depression. Other things, too, can be difficult on the depression, and make it feel worse.
The best thing I learned to do is to redefine how I see my life, my day, and my world. Accepting that there are going to be rough parts of life is a definite need for most of us. They DO happen, and they are not going to kill us. Change us, perhaps, but often we come out stronger and tougher than before. Also, making a point to see the things that make YOU happy, or even just slightly less depressed, is really important. Training yourself this way is deceptively simple, and yet oh-so difficult. Personally, I made a list. 5 things, every day, that happened to me that made me feel slightly less depressed (or just the tiniest bit more happy). It doesn't matter how small, or stupid you might think it is. Anything from finding a can of your favourite beverage in the back of the fridge, to the way your dog wags it's tail. Things so simple as "I liked the colour green today." It doesn't matter what it is, how small it is, or how silly it may seem... write it down!!
Eventually, work your way up to 10 things every day. You'll have to pay more and more attention each day to find new things.
Finally... you're allowed to have down-time. Even when you are able to get back to those things you love, downtime is important. Rest is needed. Your body may be requiring a little more rest.
And try not to work too hard. 10 hours seems like a lot!!
