Proxmox 9 was released, based on Debian 13 (Trixie), with some interesting new features.
Here are the highlights: https://pve.proxmox.com/wiki/Roadmap#Proxmox_VE_9.0
Upgrade from 8 to 9 readme: https://pve.proxmox.com/wiki/Upgrade_from_8_to_9
Known issues & breaking changes: https://pve.proxmox.com/wiki/Roadmap#9.0-known-issues
As someone who also started proxmox fairly recently, I found that the community has these really cool scripts that you can use to get started. Obviously you’re running bash scripts on your main node for some, so there are risks involved with that but in my experience it’s been great.