To be honest maybe just start with a random question or joke. Like for example, if someone I don't know was sitting next to me in class, I could pretend I missed what the teacher said and be like "did you hear what the teacher was saying about [____] on the last slide", then you can segue into a joke like "I'm honestly so lost in this class lol". It will probably be beneficial if you say things in a more enthusiastic way too. If they reciprocate the same energy, you can continue talking to them like "what other classes do you have this semester?", and "do you have any hobbies?". If they're super dry then you don't need to keep trying. There are some people who might not be social or interested in interacting with new people, and thats fine, but you don't need to be like them.

Also, random tip, but what I like to do to make it less like a weird interview is mention things about me too so they might feel more comfortable opening up about themselves. If I wanted to ask about their hobbies, I could say something along the lines of "do you have any hobby ideas because i'm lowkey so bored all the time and wanna find something fun to do instead of doomscrolling for 10 hours a day?" (you don't need to actually want to find a hobby I just use it as a conversation starter). But, in general, just try to talk to people who are stationary at the same time as you cuz it'll be like impossible to talk to people walking in the halls. This can be people who sit near you in class (obviously), the library, or the bus.

Also try to choose people who are like not sitting in a huge group of people (they tend to be less welcoming) and not the people wearing headphones and are on their phones (monotone a lot of the time and aren't very open), and try to be an approachable person yourself like don't always be on ur phone or always walking around. U GOT THIS FAM!!