working with alexa skills - right places to get info
First up, if you're developing from Alexa Blueprint Skill you can change much. Pretty much use it out of the box. For example, Q&A skillset :-
User : How to apply leave?
Alexa : Go to this page, then navigate to ....etc.
If you need to call a custom endpoint, you need to create custom skillset which can be found in the Alexa Console. The right place to get info is from here. This will give you an understanding of AWS Built in intents etc.