Cpa marketing and skills

Hello guys. I want to start doing cpa marketing and put all of my efforts in this thing but i am unsure if cpa marketing is something sustainable or not, like you can earn good money from this? ( for being independent, helping your family etc ) or is just something for 'quick money schemes' and short-term money ? Because i don t want to have a family and in the meantime spamming reddit groups or having an adult snapchat to get cpa leads, it doesn't feel comfortable. Sometimes when i research a lot cpa methods here, i feel that i learn nothing for my long-term future. Thank you.