My reason for self hosting is being in control of my shit, and not the cloud provider.
I run jellyfin, soulseek, freshRSS, audiobookshelf and nextcloud. All of that on a pi 4 with an SSD attached and then accessible via wireguard. Also that sad is accessible as nfs share.
As I had already known Linux very well before I’ve started my own cloud, I didn’t really had to learn much.
The biggest resource I could recommend is that GitHub repository where a huge amount of awesomely selfhosted solutions are linked.