My first advice is: it’s always too small. You always realize that you need more, as you can get bigger. As an example from me. I started with 3TB of storage for data hoarding. I quickly upgraded to 21TB and it’s still not enough. You may start with something small, but there is so much. Technically you could go up to AI selfhosting. Especially when you go the route with image and video generation, this takes up resources. I heard the Mac Mini is getting used for local AI.

As for what to host, you should ask yourself what do you need. Lemmy and Peertube I count towards not useful for private usage. A cloud storage like Nextcloud is something very useful. Jellyfin is useful. I would start with cutting out 3rd party cloud services from your personal usage. Instead using dropbox/google drive/iCloud and so on, use Nextcloud. Same for images. Make your local media like movies, music, audio books, books and so on accessible to all devices, with the neat features we love from other services like Netflix, Audible, Kindle and so on. You could also just starting hosting your own game servers, than renting or making it only available when you also play.

But be aware of the risks. Something like a Minecraft Server can be made accessible via VPN. If its open to the internet, the damage is rather small, if you don’t value your minecraft world that high. I rather have my Minecraft World deleted, than my personal pictures stolen. When you can open your service only to LAN, you have a lower risk to get it compromised (the risk isn’t zero! It’s never zero. Air gaped systems make it near zero, but not zero.)

When you do open your stuff to the internet, you need to update your software well and configure it well. Stuff like email is a pain to configure. I looked long for a managing software package, which made it easier for me but to leave me freedom. Next important thing is updates. YOU NEED TO UPDATE YOUR STUFF! I do prefer everything with auto updates. I use watchtower for my docker containers, even though it’s not recommended with some containers. What’s currently a big deal breaker for me is PostgreSQL. I threw out containers and avoided containers requiring it, as it needs manual interaction. For work I actually need to migrate from MariaDB to PostgreSQL for our chat system. At least they do use the LTS version, so you aren’t constantly needing to manually update.

As for the hardware, it highly depends on what do you need. A rented server (a VPS or a dedicated Server) does have the advantage to be easily in the internet and on the same note, this is a disadvantage. For email and websites this is good but you need to be very careful. You can start with a Raspberry Pi. Home Assistant does run on it and they do offer some apps, like AdGuard Home, Bookstack and Vaultwarden. You can also start with a NAS. I run my stuff on my Synology NAS, a DS920+. It has Docker. But you may want to look into a different company, as Synology did some bad stuff, that makes me them not recommending it anymore. I did heard Ugreen should be good. Obviously you could always go bigger and build your own NAS and using truenas or something else. You can also start with a MiniPC and use Proxmox.

For the operating system, I think the best thing is what floats your boat. I do use Ubuntu. Why? Because I like it. Using Containers is a big recommendation from me. With Proxmox you have VMs and LXC containers, which allows you to experiment within a container and separate stuff. You can throw it away easier, without disturbing other stuff, that is working.

I really would recommend to start small and keeping an eye on risk. Start in your local network and with stuff that isn’t big risk. If you stark taking more risks, don’t go full in in the beginning. If for example you hosts your own file cloud or email, don’t abandon your previous provider and start small, with unimportant stuff.

Now to myself: I have running a rented server, a Pi, a Synology NAS and a mini PC.

I did start with a VPS. Very hard and I made quite a few mistakes. the authorities twice called me out for stupid mistakes. It was the fun days, where I actually thought running a Windows Server in the Internet was a smart idea. I did run a webserver and email from them for quite some time. I even had a Skype Music Bot running without issues. What the authorities didn’t like where my attempts with the DNS Server and my MSSQL Server. Now my rented server is running my mail and webserver (with Nextcloud) and if I feel fancy, a game server. I don’t utilize it as I could and in the near future, I do want to switch things up but I need to keep my mail running.

My Synology NAS is the big stuff. It has my data on it and runs most my docker stuff. There I run audiobookshelf, calibre-web, gitea, jellyfin and paperless-ngx for my main stuff.

My Raspberry Pi 5 is running HomeAssistant to control my smart home stuff and a new addition is Music Assistant.

My mini PC is running Proxmox with Frigate. Frigate is a NVR for your cctv. Not that I have a big cctv system.

Technically I did start earlier with a Minecraft Server and a Teamspeak server, running from my own PC but that has the big downside, that you need to keep your PC running.