Hey Eric!
I always recommend Vodafone. I’ve been using them for years, and they’ve been great for both staying connected at home and traveling around Europe. Their plans are affordable and include roaming across most European countries at no extra cost, which is perfect for trips. They also offer options with unlimited data, so you don’t have to worry about running out. You can easily pick up a SIM card when you arrive in the Netherlands, or even set it up online in advance if they support eSIMs. It’s been super reliable for me, and I think you’ll find it works really well for your studies and travels!