So I just got the Canon R6 and honestly I'm totally lost with all these numbers and letters. I saved up forever for the camera body but now I realize I don't actually have a lens to use with it lol. I'm going to my sister's wedding in two weeks and I really want to take some nice photos of the family but I'm worried I'll buy the wrong thing.

My budget is around $800-900 right now. I just want one lens that can do a bit of everything so I don't have to keep switching them out while I'm still trying to learn how the camera even works. Sorry if this is a dumb question but what is the best all-around lens for this camera?