Hints for Finding Suttas on a Topic

Question: Can you point me to the Nikayas needed for this discussion and show me how to find them online?

Yes, here is an example for finding suttas on "energy" (viriya):

The suttas can all be found at https://suttacentral.net/
Once there, select the "Basket of Discourses".

That will take you here: https://suttacentral.net/pitaka/sutta
There you will find the collections of Long (DN), Middle (MN), Linked (SN), Numbered (AN) and Minor Discourses, plus Other Discourses.

The major Nikayas are the Long, Middle, Linked and Numbered. All of them have passages involving energy (Viriya) and right effort.

For example, if you select the Linked Discourses, it takes you here: https://suttacentral.net/pitaka/sutta/linked.
To explore the Pali Nikaya, select the top volume, The Linked Discourses Collection (Saṁyutta Nikāya).
At this point, there are five groups of suttas listed, and it can be difficult without knowing the whole volume to know which one to explore. In this case, go to the last one, The Group of Linked Discourses on the Path. https://suttacentral.net/pitaka/sutta/linked/sn/sn-mahavaggasamyutta
Here you will find sections on the Faculties, the Five Powers, the Right Efforts, and the Awakening Factors.

These sections are very repetitive, so it might take some effort to find a couple of passages that speak to you (how appropriate for the topic :)

Of course, this is only one of the Nikayas.

You could also just go to https://suttacentral.net/ and simply search for "effort".