JAmp ships as enabled for the native Joomla! article view. As a rule of thumb the Google AMP format should be used for news-like pages, however JAmp is able to generate the AMP version of pages of your website for every component and view installed.
As an example, if you want to enable JAmp the K2 articles it's enough that you select the K2 'Item' view in the dropdown as visible below:
It works the same if you are using another kind of view for the homepage of the website, for example if the homepage is linked to the 'Featured articles' view or 'Category Blog' view. You will activate JAmp for such view accordingly:
Pay attention that the dropdown is multi-select, so you can select/unselect multiple elements by pressing and holding down the CTRL button.