After you have selected a Template and a Style, scroll to the top and click the Save button.
This will save the form that you just created using CF7 Skins.
Now to make your form to appear on your post/page:
1. After you save your form, a code snippet will appear under the main title of your form.
2. Highlight this code (called a Shortcode) and copy it.
3. Go back to the post/page you are working on, copy the Shortcode into your content where you want your form to appear.
4. After you Save your post/page, the form will now appear.