Error: no DISPLAY environment variable specified on WSL

Good morning

I run Ubuntu using the Windows Subsystem for Linux on a Win11 equipped laptop, I've recently tried to install firefox and open it through the CLI but, whenever i give the firefox command followed by anything, it just says

Error: no DISPLAY variable specified

I tried following this guide but it now just says:

Unable to init server: Could not connect: Connection refusedError: cannot open display: :0.0

Any help would be appreciated.