It's probably displaying help output because something went wrong parsing the command. Scroll up to see what it says the problem is. Perhaps you forgot a dash or misspelled "install"?

Someone else mentioned VM but didn't give details.

Click Start, type in HyperV, install the HyperV component. In HyperV, click Quick Create. Select Ubuntu, install. You'll have a full Linux running in a window as if you built a second PC.

Good luck with windows closing your WSL session without warning

I god fed up with it eventually

My problem has been solved. Thanks.

If you download Ubuntu from the App Store it should set everything up for you without needing to do anything.