How to make friends after contact info

Hello, I am pretty shy and introverted with social anxiety but I’m a first year second semester college student with no friends yet but I’ve exchanged contact info. I have one guy’s number, I’m in a instagram GC with 6 other people, and created a instagram GC myself with 2 other people. Now what? Like, should I just hit em up like hey wanna go eat? Like, I don’t know what to do. I’m pretty bad at conversations as well though. I mean I can talk my social anxiety isn’t that severe, but I struggle still.