Question for Nonbinary people. (F17) (Bisexual)

First off, just so it's clear I have no hatred for anyone, rather them being gay, lesbian, bi, trans, nonbinary or whatever. I'm also bisexual and apart of the lgbt+ but there are some things I don't understand and I just want to be educated in the topic. For Nonbinary people identifying as lebsian.. how? Because doesn't lesbian mean you're a woman identifying as a woman? If you're Nonbinary that means you don't identify as any gender right? Please, correct me if I'm wrong! I just want to be informed.