AMP for WordPress
Well, I've made several tutorial articles on AMP. Will link them here in case it helps anyone (making a separate topic as @mikho suggested to be a good idea):
The working Google Analytics implementation method has changed with the AMP plugin updates, so I've left the old ("legacy") code for reference, but included the code that works (for) now.
There are plugins for this, but I was looking for a plugin-free solution (and have found it). It's better to not use any plugins for stuff that can be done with just a little child-theme custom code. Makes things faster and more stable in the long run.
I can't tell you which hosting to buy, but I've written in great detail about the providers I've used so far:
BikeGremlin web-hosting reviews