Try creating a physical array out of those 6 disks. Here, some remote assistance will be great to review and help you with reconfiguration, yet it is not possible as you have a FREE license. Please discuss converting to StarWind VSAN paid with the person who provided you with the key.
Press the gear-shaped icon > navigate through the menu to Install Management Console > you should be able to download the installer. Make sure to select only the StarWind Management Console and Integration components library when installing.Where I can & download the Starwind Windows console, because it wasn't bundled with the Proxmox package?