GothamChess made a chessable course and it includes the Ponziani, if you have the money you can get the book version for 50 pounds, or around 30 if you get it on sale.
https://www.chessable.com/the-gothamchess-1-e4-repertoire/course/147580/
It's not a bad course, I'm working through the Sicilian chapters. But it's probably not worth it to get the videos if you are on budget.
if you are not willing to spend money, you should be able to find some stuff on Youtube.
Can someone teach me (or help me) Learn the Ponziani
1. e4 e5 2. Nf3 Nc6 3. c3