I am a woman who has had a frum up bringing so I am familiar with most sources. Is lesbianism really forbidden? Where? Why? How? Is there a stance on Lesbians having or caring for children? Would appreciate being provided with sources. esp, aside from Rambam.

Lesbianism is forbidden by the Torah (VaYikra 18, 3). The Rambam cites the prohibition in Hilchot Issurei Biya 21, 8 and it is cited as well by the Shulchan Aruch Even HaEzer 20, 2.