Selfhosted

I'm interested in exploring the world of self hosting, but most of the information that I find is incredibly detailed and specific, such as what type of CPU performs better, etc. What I'm really looking for is an extremely basic square 1 guide. I know basically nothing about networking, I don't really know any coding, but it seems like there are a lot of tools out there that might make this possible even for a dummy like me.

Right now, my cloud computing is pretty much typical, I think. I use onedrive to sync my documents and old files. I need to be able to quickly access files on different devices, such as a powerpoint created on one device and presented on another. On my phone I use Android and my backups of downloads and photos and other data (messages, etc) are all on Google Drive /Google 1.

I'm willing to spend the time learning to an extent, but I'm not looking to become a network expert. I'm also willing to spend a little bit of money on hardware or a subscription service if necessary. Ideally I'd like to be out of this subscription service game, but the main goal is to be in charge of my own files. I have an old laptop running Linux to play around with and a fast and stable home internet connection.

Eventually, I would like to not only be syncing my files, photos, and documents in real time, but also I'd like to maybe try using it as an entertainment server to watch/listen to downloaded media on my home network.

Is there such a thing as a guide for a total beginner starting from zero? Is this worth attempting, or will I quickly find myself frustrated and in way over my head? Or, do I need to wait a little longer until more idiot-proof tools become available?