I did this for about a year in college with biolife. It was better pay though, went $50-95/wk. Its very similar to giving blood, if youve done that before you'll be fine. I eventually had to stop because my overall protein in my body started dropping after a year of doing it. Just never went back because it dropped in value, 75 vs 40.
This is how it went for me.
First appt, you get a physical and kind of an orientation.
To donate they make you sign in and take a survey of questions to make sure you can donate.
They then take your stick your finger and fill up 2 viles of blood about the size of toothpicks. They then test your blood protein and look for hematocrit. While they are testing that, they take your blood pressure, body weight, and body temprature. If everything checks out you then go on to donate. Now the key to giving plasma is the person hooking you up, if they're good with a needle, its painless but sometimes it hurts like heck of the person isn't the best. For me it a 50/50 good stab with the needle, you'll learn very quickly on who you want to stick the needle in you. Takes about 45 mins depending on the amount you'll donate and that is determined by your weight. I weighed 175lbs and gave 680ml. I havent done this for almost 3 years now and i still have a scar on my left arm where the needle went it, looks like I was a previous drug user who was always shooting up in the arm.
Would I do this again, probably not. But like you I was in college and with a full load and tough classes, $40 was grocery money and a little spending money with friends.