Mrs. Orbert and I have seen all the MCU movies, mostly in the order released, but the timing for Captain Marvel was just bad. I was kinda bummed to not have caught it in the theaters because I knew it would be too early to be out on video yet, but we decided that with like 300 characters, maybe missing one of the origin movies wouldn't be a huge deal.
Hopefully without spoiling things too much, I'll say that Endgame was good, and while it may have been helpful to have Captain Marvel's backstory, I don't feel like we missed a whole lot.
We found out that there are still theaters showing Captain Marvel, but whatever; we went for the big one anyway and will catch Captain Marvel on video.