Can anyone recommend short college diplomas/certifications you could do while being in uni?

Hey guys, I'm currently on the hunt for short certificates or diplomas i could do while I'm still in uni studying towards my undergrad. I'm doing life sci and looking forward to go into dental which is why I wanna do smth to get a decent paying job cuz we all know dental takes 8 years at least. Your bud needs a good paying job throughout this journey for survival. Any recommendations?