“The Rambam seems to disapprove of women learning in most situations.”
Actually, if you reread the Rambam cited in the opening message of this thread as well as the mechaber in reish mem vav sif vav, what they disapprove of is teaching them (see the Rma who qualifies this as well and states there things we must teach them), not if they learn something on their own. If they do learn something they earn schar on the level of aino meztuva vioseh. the value of that schar is HKB’H’s domain, not ours.