A lesbian is someone who Identifies as female (or sometimes non-binary) who is romantically interested in other people who identify as female.
Gay is sometimes used as an umbrella term, but it is specifically a male identified person who is romantically interested in other male people.
Bisexual usually means attracted to males and females ( in my case it means attracted to non-binary people and other females), and pansexual means being attracted to all (or most) gender identities
Transgender people are assigned one sex at birth, but are not comfortable with that sex. There are a few main types of transgender:Male-to-Female (Trans Girl/Woman), Female-to-Male (Trans Boy/Man), and those who don’t really identify with either one all the time (Non-binary, Genderfluid, etc.)
Asexual people have a lot of love to give, just not romantically or sexually.