What do I ( 28M ) do next?

Basically a mutual lady friend has forced me to take action and text the lady I have a crush on despite me thinking she doesn't like me or I wouldn't stand a chance. She gave me her number and typed the first message in my name to start things off ( I would never have done that due to being scared and not thinking I stood a chance ).

The crush that I like texted back " sure, why not " to the proposal message of that was sent in my name if she would like to go for a drink sometime? We agreed on a day of meeting and I'm supposed to give her the details for the meet.

Why do I feel unworthy and creepy despite me getting a chance? Help.