@Penlu: The idea of yours really sonds promising and cool! And even cooler is that you are developing it from scratch as a 12-year old! I really appreciate your work!
Hmm, if you want to dock, you would want to dock with the ISS. But I understand that you have to do some maneuvers to get the rendesvous right (which needs engines, just as de-orbiting also) and then quite some RCS fuel for maneuvering around the station. Can it carry that fuel and the engines for that?
Also, why would you send one man with such a small craft to ISS? You can't bring scientific gear with you, no consumables or other needed things. It could be an escape pod though...that'll be cool
I would say that if you don't have reasons to go to the ISS, you could discard the docking ability. Could save you from some headaches.
And please don't feel discouraged in any way! I just was talking about the practical applications for the craft.