Good news -- with your current diagnosis, it should not impair your fertility at current. If you undergo certain types of treatments for the abnormal cells, it MAY weaken your cervix somewhat, but that would only affect you during labour, if it were to affect you at all. Many women have undergone cryotherapy, LEEP, excision, laser treatments, etc. to treat lesions and have had ZERO problems conceiving or delivering healthy babies!
I would still suggest you speak with a good obstetrician/gynecologist in regards to giving birth with an active HPV infection though, as that will probably ease a lot of your concerns!
As for harming your future kids, when in vitro, fetuses are protected from viruses like HPV due to having their own isolated blood supply. You actually do not share your blood supply with your unborn child, believe it or not. They are protected by a special casing/barrier.. the placenta! The only chance of transmission that is currently known is during the birthing process. Although rare, with the genital warts strains of HPV (which is not what would have caused your lesion) there has been cases of transmission from mother-infant during birth, wherein the infants have in result developed warts in the bronchials and on/around/above/below the voice boxes.
Again, not the strain you are infected with.
If you are concerned about transmitting the virus during birth to any future children, I would encourage you to speak with an OBGYN about it, but there are still ways to minimize the possibility (such as C-section).
Also, it is entirely possible you will have "cleared" the infection by then (it will have gone dormant) in which case any worries of transmission would be minimal if not completely null. There have been very few cases of HPV transmission from mother to child, so you really need not worry. But again, talk to an OBGYN if you still feel concern about that!
If you have any other questions I can help you with, let me know. I am glad to hear you have done some research and eased your worries some! That is very important and helpful for the immune system!