What are free ways to get traffic for CPA??

[Sunsetze]

I hope I'm posting in the appropriate section. Similar to many others here, I'm interested in CPA marketing and specifically in free traffic sources. If any of you are willing to share your methods, I would greatly appreciate it. My goal is not to become rich, but rather to earn a single payment that I can reinvest. Additionally, I would appreciate any recommendations for the best CPA network. Thank you.