so, what would happen if i started lifting weights?

the answer is actually not much.

i mean, it would have some effect, surely. but, due to the almost total absence of testosterone, i would be unable to build chest or arm muscle in any seriously substantive way. rather, i would end up carrying through with more of a "toning" process, where i might firm up existing fat but not actually gain any weight.

i'm not interested in doing that experiment. but, i'm pretty confident that it would have a minimal effect.