I'd advise you to look through the monthly starter threads so you get an idea of what people are doing/experiencing since it does seem to vary quite a lot.
Also you may want to discuss it with whoever you see about your mental health because that could be affected. Personally I have adhd and take Elvanse and since starting Mounjaro in Feb this year I have noticed a difference in a good way, it could be the weight loss, the much healthier diet, controlled blood sugar or the Mounjaro itself.
Most people will probably say the same thing, keep up with the exercise, especially strength training and drink plenty of fluids and you'll have a better time and get better results. Also make sure you get plenty of protein.
Honestly for me it's been the best choice I've ever made for my health, other than the private adhd treatment a few years ago. I've lost weight, I have loads more energy, I don't crave sweets or junk food at all anymore and I was essentially a sugar addict before. Losing the weight also makes it so much easier to exercise and much less aches afterwards. My mood is so much better because my blood sugar is normal, I don't ever get hangry now.
I have had a few side effects but nothing awful, occasional nausea that I solved by changing my jab to a morning rather than evening, occasional diarrhoea (maybe ice or twice a month) that came from eating things with too much dairy, easily solved again.
Also, if you don't get on with it after giving it a month or two, you can always just stop and it'll wear off, it doesn't linger in your system for more than about 7 - 10 days I think.