I knew a lot of students who donated plasma.
Look online on any job search site. If the requirements and experiences are not too technical still apply. Most employers prefer someone with the motivation to work and willingness to learn than someone experienced who's going to want to look for something better in 6 months.
Don't go with the attitude that you're in college and they have to adapt to your schedule... it won't work. You need to balance your study and work time so there's some flexibility from you and your employer. SO basically ask them what is their schedule need and tell them what you can do but you might have to make adjustments to your study schedule; don't expect someone to hire you to work just weekends.
And you can take the bus if the job is not on campus or within walking distance.
While going to college in Iowa I worked PT with the city driving mass public transportation. They had great training, I got my CDL license on their expense, and I got to drive big buses around campus... it was a lot of fun because I got to know the town a lot.