For someone as tech illiterate as my mom, I’d advise against trying it.
But you are here and my mom would never know that Lemmy is a thing. You also ask about Linux.
I’d guess that you will have great fun using and appreciating what Linux and the foss communities have created.
Snap has a locked and proprietary store, even if the client is FOSS. There is no reason to “hate” Ubuntu but there are better choices.