To check what distributions of WSL are installed
wsl --list --verbose
Expect to see Ubuntu on the list. If not... go install it. If you have Docker installed, that may add two distributions.
To set a default distribution
wsl --set-default <distribution name>
To launch a specific distribution
wsl --distribution <distribution name>
Can use optional --user
option
Once you run this and a WSL terminal opens up, you may not be in the home directory, so may be good idea to run
cd ~