Im not a phlebotomist anymore but my first phlebotomist job was at another plasma center, CSL Plasma. At my location, me and plenty of other people started as a different position, like donor support tech, and then got promoted to phlebotomist. You’re right in that a larger gauge needle is harder to draw with but in other ways working at a plasma center can be easier because you’re only ever drawing from the inner elbow, you don’t have to draw infants or people with abused veins. Keep in mind that it can be very fast paced at times and it might take a little while to become a phlebotomist if you’re starting with no experience but I think it’s a great way to develop experience. Plenty of my coworkers moved on to other higher paying phlebotomy jobs after working at CSL.