Is PinePhone good for me?

[Gon]

I write to you from Spain, and I have a few questions about PinePhone. I am a fervent user of linux system, using it daily on my computer. But I'm not an advanced user, and don't have high knowledge about it.

So the question is: I would love to buy PinePhone for me, is it possible with my linux level?

The other question is: are they going  to sell another Manjaro's version again? If not, is the KDE version easy to use? which is the easier OS to use? 

And the ultimate: could I use Whatsapp on it?

Thanks a lot for your attention,

Waiting for your answer.