You're not joking. If you're like most people and have only a few TiB of data in total, self hosting on a NAS or spare PC is very viable. There are even products for non-technical people to set this up (e.g. software bundled with a NAS). The main barrier is having an ISP with a sufficient level of service.

The statements made in the linked description of this cannot be true, such as Google not being able to read what you sent them and not being able to read what they responded with.

Having privacy is a reasonable goal, but VPNs and SSL/TLS provide enough for most, and at some point your also just making yourself a target for someone with the power to undo your privacy and watch you more closely- why else would you go through the trouble unless you were to be hiding something? It’s the same story with Tor, VPN services, etc.- those can be compromised at will. Not to say you shouldn’t use them if you need to have some level of security functionally, but no one with adequate experience believes in absolute security.