Going to be a jr in college this fall. Sent a girl I went to high school with a dm on instagram yesterday night and have been left on read for almost a full day. Also worth noting that we did not interact at all in hs despite being in the same grade and even a class together. What could I have done differently here and is there anything I can attempt to say at this point? Input would be much appreciated. The message I sent is as follows:

Hey it’s from (high school name), I know we didn’t talk much in hs but think you’re pretty cute. What do you say to getting drinks later this week?