Highly recommend Dream Team if you ever have a chance to give it a try! It's admittedly pretty heavy on the tutorials at the start, but once you're past that it's a strong title!

I know next to nothing about it and would be entirely neutral on it if its name, setting, and release date weren't so similar to Outer Wilds that people commonly confuse the two

I just recently lost my grandfather to cancer, so I know the pain you're going through all too well. I sincerely hope that things turn around and your grandmother recovers, even if the odds are against her. Rooting for ya, man