What environment to use? NAS + Homelab

Hello,
I want to use 1 PC for NAS and Homelab. Currently I am using Lenovo M93p Mini PC and Asustor NAS. I bought HP Elitedesk 800 G3 and now the question is what environment to use?

What I want:
- RAID 1
- Reliable NAS
- Immich
- Plex, Radarr, Sonarr, Prowlarr etc.
- VPN (piVPN)
- Adguard
- Ollama - for experimenting

I have used OMV and Ubuntu. I want to separate Ollama from the other services. What should I use? Do I need Proxmox or TrueNAS will be enough for me? Can I have Proxmox and RAID?

Thank you!