You should be able to do everything through the web interface.

You can make network shares by creating shared folders under Storage->Shared Folders then configure your Windows shares through Services->SMB/CIFS

Install the openmediavault-compose plugin to manage your docker containers.

I would also suggest installing the openmediavault-wireguard plugin for secure remote access to your services from outside your network.

It has USB 1.1, which is very slow. You can run software from a hard drive if you have a PS2 fat. It is also possible to run from a network share or a PS2 memory card to SD card adapter. Some methods are too slow to play FMV without skipping.