How do I use AI models?

To use a skill, login to your account and you'll be taken straight to The Playground.  You'll see a variety of AI Model Cards.  Click on any of their "Generate" buttons to be taken to the input for your cue.  There are too many skills to fit in one screen, so you can either search for skills in the search bar in the top-right corner, or use either the top or bottom "Next" and "Previous" buttons to browse through the available options.