Good question. Even though you can theoretically start earning with CPA from the day you start your first account, most people are unprofitable for a few months (that I know, I was lucky and found good niches immediately, but it war pure dumb luck I'm honest). Many guys who I helped on Skype with CPA actually failed hard, but managed to get some clients, though they lose most of them after the first month because they aren't knowledgeable. It's better than nothing though I guess. To be honest, if you are a hard worker you can learn and do all things at the same time. Start a few CPA accounts, only to test what's profitable to then quickly scale. And then start some growing accounts on the sides, grow with f/unf for the first few thousand, then you can either decide to monetize, sell or use it to pitch clients.