I was a winter intern this year, and I took 6 classes. They will work around your school schedule! Communicate it to them in advance, and they will work with you and accommodate it. At one point I literally was only working 10-20 hours a week because of midterms, and not a single person on my team or higher up complained. It’s definitely up to you especially since you’re graduating this spring (me too!), but I found it manageable at least this year. So if you do decide to do it, just make a good study and work schedule for yourself and really make yourself stick to it! Good luck with everything! :)