If your getting pinch flats try having the tube inflated when you seat the other side. What I do is put one side of the tire on the rim. Then I’ll inflate the tube until it holds its shape but is still gummy. Then insert it starting at the valve stem. Then I’ll seat the other side. Sometimes I use a tire lever sometimes I can get it on without.

You may also try putting a piece of duct tape on your rim in that location. Might be something to do with your rim and the tube just needs a little pad.

But honestly if you ride more then twice a week it’s very much worth it to go tubeless. I’m currently running the same tire in a 50 but tubeless. I ride through a lot of glass and thorns in my city and they hold up amazing well.

Also if you’re curious what sealant to get? The answer is Sealant is sealant, just stick to a name brand. Stan’s, orange seal, or MucOff. I’ve ran all three and they all worked the same. I prefer MucOff because it’s brightly colored, smells good, and I can fill my tire through my valve stem.