I had a root canal on a molar when I was 15. I can’t compare it to a filling, because I’ve never had one. Root canals hurt, but it’s really not so terrible. You’ll be given decent pain killers, hopefully. I went right back to work as a camp counselor after mine, and it was do-able probably because I was numb (I also ended up biting my lip so hard that I bled like crazy and scared the kids- my whole face was numb, but that’s another story). Stay on top of your pain meds to make it manageable, and eat soft stuff for a few days. You should be just fine. :)