Lesbian sex for the first time! scared! 😩

Katharina
Hey guys and girls! 
About a year ago I figured out that I am bisexual. Now I have my second girlfriend and she is a lesbian. She had lots of girl but we are getting closer and closer and two nights ago she fingered me.. I wanted to pleasure her as well but she didn't let me. She knows that I never had sex with a girl before so she wants to show me everything before I "go down" on her.. I think it's cute that she thinks about my point of view but I want to pleasure her too! I mean it's not even real sex if it's just one sided pleasure is it? So now I am freaking out because for the first time that we are having sex I want to surprise her.. I wanna be good for her.. and pleasure her and all that.. but I don't know how. Also I'm always stressing out myself and putting lots of pressure on me.. anyway how can I pleasure her? How does lesbian sex work? She said she likes it if I tell her what I want.. but how do I do that? Heeeeelpp please 😩😩😩😳😳😳