+1 for Forgejo. I started on Gogs, then gathered that there had been some drama with that and Gitea. Forgejo is FOSS, simple to get going, and comfortable to use if you’re coming from GitHub. It’s actively maintained, and communication with the project is great.
There’s lots of ways to skin this particular cat. My current approach is low powered Synology (j series?) for mass storage, then 1 litre PC’s running proxmox for my compute power using their NVME for storage, all backed up to the Synology.