I'm sorry to hear about your current health situation. I was 28 yrs of age when I had a hysterectomy. I have felt great since having it although I have always felt sadness due to not being able to have more children at such a young age when I wanted more children (I had three healthy children, but always wanted seven...yes...seven). I still have my ovaries, so never had to suffer early symptoms of menopause. At my age now, they must still be working for me since I still feel great! If the doctor plans to leave your ovaries, you should be just fine. Or, if they place you on hormone replacement therapy, you should be just fine. The only thing that changed was I no longer had a uterus, and no more periods. It did not affect my sex drive, it increased it. Problem was, my husband at that time no longer satisfied me. Sex was boring before the hysterectomy, and even more boring afterwards, so it is not true that just because you have a hysterectomy, your sex drive decreases. I hope all goes well for you. :)
As for how it will impact your return to work, my doctor told me I would experience tiredness for up to one year, and not to fight the afternoon need for a nap. He was so right about that. If you return to work six weeks post-op, you may feel tired a lot at different periods of the day, but ask your provider about this. It was true for me, but it doesn't mean it is true for every woman who has a hysterectomy. I was not working the year I had my surgery, but I was raising three small children, and the naps sometimes did not correlate with their naps.