Clubs like the Freshmen Leadership Organizations (FLO’s) are competitive. You apply and wait to see if you are chosen. Some apply for many things, then might be chosen for just 1, or none. But don’t let that discourage him. My freshman didn’t make a FLO and his best bud did. He was upset for a little while then decided to find something. At first, it was sand volleyball. He would just pick up a game with others who came out. Or disk golf. He found a church group he likes. He joined a car club and a dance club. Now, he’s going to open mic nights places to sing and play his instrument. The only thing he does engineering wise is the car club and Christian Engineers. He has so many other interests besides the engineering. There are some students who that’s what they love and can join those. They are not all competitive.
Here is a great link to explore https://maroonlink.tamu.edu/organization/studentactivities
Here is organizations http://studentactivities.tamu.edu/get-involved/join-an-organization/
When I click on a categories, like recreation, this comes up https://stuactonline.tamu.edu/app/search/index/index/search/category?q=Recreation
Explore all of the categories. They will tell you when they admit members, any costs, how often they meet, etc. There are two fairs a year where a student can go and check them all out and talk to people. It’s usually a multiple day event in September and January.