In App tracking Clic and Loading Time

Hi Community,

I'm trying to understand how to find the specifications needed to track correctly some elements in my App:

1. Clicks that occurs on some specific buttons (Information on my order, order details, etc...)
2. Loading time of specific pages (order details page for example). 

I found this documentation that is helping me a bit, but I'm not sure to understand everything correctly.

When the documentation says "Map the context data name that is defined in your code, for example, a.action=myapp.ActionName, to a custom event." 

Does it mean that I need to add the "a.action=myapp.ActionName" manually in my code, on each button I when to track?

Then I can go to mobilemarketing.adobe.com to maps the variables as mentioned in the documentation?

Do you have any advices or do you know any other documentation I can look at in order to help me?

Thanks a lot for your help,