UPDATE: To everyone who suggested YUNO, thank you so much. This seems like it is about to make my journey much easier. It is basically almost exactly what I was looking for, but I was unaware that it existed.
Thank you ALL for your suggestions, actually. It's a bit overwhelming for an almost complete noobie but I an going to look into all of the suggestions in time. I just saw that there were several mentions of YUNO so I decided to make that one of the first things I investigated.
So, about two months ago, I had a very eye opening experience. As the result of a single misconfigured security setting on my Android, I was locked out of my Google Account on my phone AND all of my PCs. I had no access whatsoever to Google, or any of the literally hundreds of services that I get through Google.
This is when I realized that I relied entirely on Google/Android because those two days were actually very difficult, being cut off from media, services, passwords, everything, from the past almost twenty years of my life, could be taken away from me in an instant. The decades of my life that were locked away in my Google Account included hundreds of thousands of pictures, almost a hundred thousand audio tracks, several hundred books, several hundred apps, thousands of videos, etc. ad infinitum. Unfortunately, very little of this material was backed up at that point. That is my fault. Also, the misconfigured security setting was my fault as well.
The amount of data, media, memories, services, etc. that would have been lost is actually endless and it would have affected my life in several ridiculously negative ways.
Luckily, in the end, I was able to get my access back and then basically immediately grabbed all of the several terabytes of information and media of mine that they had, and that I was almost locked out of. I have it all in my house now on a drive in my computer, with a backup made on another disconnected disk.
I then decided that no corporation was ever going to have such an insanely high level of influence on and control over my entire life and my media ever again. That experience was actually very scary.
I've been trying to get into SelfHosting, but am finding it quite daunting and difficult.
There is a LOT of stuff that I have to learn, and I am mostly unsure of where to even begin. I know basically nothing about networking.
I need to learn the very basic stuff and work my way up from there, but everything that I've seen on the Internet assumes that the reader already has a basic to intermediate understanding of networking and the subjects that surround it. I do not, but I am going to learn.
I just need someone to show me where to start.
Thanks in advance for any assistance!
I think the very first step to building resiliency is to sign up for Proton's cloud services. That will give you access to mail, both from Gmail via forwarding and a new inbox with a separate address. You'd also get a password manager and cloud storage. From there you can start self-hosting alternatives. Probably start with Immich as Google Photos is a big deal and it takes a ton of storage. Proton is a Swiss non-profit so the probability for enshitification is not nearly as high as with Google.
As soon as you have redundant storage, do a Google Takeout and download a full archive of your stuff. This feature may not be there for long given the current corporate climate.
Thanks, I will certainly look into this after I get some sort of basic understanding of the concepts at play.