I am so sorry to hear the situation you find youself in. huge hug (((((HUG)))))
I had the same something over three years ago, not the keyhole and robots mind, I had a vertical incision and a surgeon with hairy arms but that is beside the point. I also was aware pre-op that the top of my vagina would go. I was not told it would affect my sex life. After the op I was told that in fact more than half of my vagina had been removed and this came as a dreadful, dreadful shock. I joined this forum then (under a different name) and asked around for women who had lost significant portions of their vagina. I didn't get a single response and so I left the forum feeling desperately alone. I don't want that to happen to you.
Sex with a reduced vagina is perfectly possible, it isn't the same but it's still fun. To be honest with you, I think that the missing cervix and womb have more of an effect on the sex than the top of the vagina. I am a lot older than you. It has taken several years since the op for my libido to drop off completely, but this is to do with menopause and not the reduced vagina. I would really like to think that if you get back on the horse (as it were) as soon as you feel able, and stick with it, learning new techniques as you go, then you'll be OK. As long as the libido remains, you will find great ways to satisfy it.
Wishing you all the very best for a full and speedy recovery, you'll get there :-)