My husband and i just bought our first handguns, I got a Glock 17 Gen 4 9mm and my husband got a Sig 2022 9mm. One thing to remember about the Glock is that it doesn't have an external safety (which I didn't want anyway) so if she's going to keep it in her car, she should put it in a holster. Doesn't need to be anything fancy, just something with a trigger guard.
Secondly, initially it was a total bitch to take apart. But once I figured out the specific way to do it, I've got it down and can do it eyes closed. It's still not easy, but definitely possible and you don't need herculean strength to do it.
Let me know if you can't figure it out and I'll try to help.