You’re right, ne pas is used in front of an infinitive. I don’t have a lesson dedicated to it because it’s really that simple – there’s nothing else to say. I mention it under word order in this lesson: https://www.lawlessfrench.com/grammar/infinitive/

Ne pas + infinitive = Not + infinitive

where you can employ an infinitive, you can employ ne pas + infinitive : as subject, COD, COI, CC, …

except if you already have a negation:
sans manger => sans ne pas manger : impossible

pas is generally before the verbe, but can be put after the verb also:

• n’y prendre pas part ou ne pas y prendre part (with pronoun)
• n’avoir pas lu or ne pas avoir lu (with auxiliary)

You have another constructions like that (before or after the verbe):

• ne plus = not anymore
• ne jamais = never
• ne guère = not much