Just focus on one project at a time, break it out into small victories that you can celebrate. A project like this is going to be more than a single weekend. Just get proxmox up and running. Then a simple VM. Then a backup job. Don’t try to get everything including tailscale working all at once. The learning curve is a bit more than you’re probably used to, but if you take it slow and focus on those small steps you’ll be fine.