Sadly I think the Purism phone just was pushed back wasn't it?
I was in the same boat as the grandparent. I ended up getting a cheap phone that I could put lineageOS on, I installed F-Droid, and I didn't install any of Googles Apps. Its working out very well actually.
I know HMD isn't the original Nokia (though it has a lot of the management) but it's an excellent phone and with AndroidOne you get security updates immediately which was a big thing I wanted after Moto-G's