To switch between different Node versions using nvm (Node Version Manager), you can follow the next steps.

List all the available installed versions:

$ nvm list
->     v14.20.1
       v18.16.0
        v19.9.0
         system
default -> 14 (-> v14.20.1)

Select the one you want to use

$ nvm use 18.16.0

Also it is possible to just say:

$ nvm use 18

Set the default one:

$ nvm alias default 18.16.0

Make sure it worked:

$ nvm list
       v14.20.1
->     v18.16.0
        v19.9.0

Or:

$ node -v
v18.16.0