I don’t know if you are into gaming but my college freshman reports that so many kids don’t put down the controller to the Playstation/XBOX that they are missing out on meeting people and engaging even after they do know their hall/dorm mates. So first, put down the devices.
Otherwise smile, make eye contact, be friendly, and offer to help when someone needs it. Relax and enjoy yourself and that will create a good energy that others will feed off of. Keep it light and don’t stress about it too much. You’ve made friends thus far in life, you will in college too.
Be open to new activities and groups you might not have thought you’d be into. My freshman never had any interests in going Greek. Honestly it was the last thing I thought he would do. Things were a little slow the first two weeks of the fall semester so he rushed just to check it out. Ended up pledging and absolutely loves being in his fraternity. So you never know what will be right for you.
Enjoy!