When I was a newbie, my first project was also Nextcloud. Honestly, Nextcloud is overkill if all you need is to host a calendar. You can probably find something that meets your needs (like Radicale ) at Awesome Self Hosted.

If you are getting started in self hosting, you should spend a little time learning Docker . It’s a tool for hosting software in individual containers on your local computer. You will find that many self-hosted apps have installations for Docker container versions in their documentation.

For me, once I understood docker, and also Portainer , a web UI for Docker, I got over the learning curve and was able to install most Foss apps I found online. Good luck!

Screenshot of Portainer, showing a list of Docker containers running various Foss apps

It sounds like you are ready to learn about self-hosting your own media and using services like Jellyfin and Navidrome to access your media.