ok so everyone's hyping up fb tiktok google ads for cpa like it's some huge goldmine right. they all say just test scale repeat but nobody tells you where to actually start. do i just throw money at these platforms and hope it works or is there a secret trick? i get the idea, find your niche, make ads, target people, whatever. but honestly it feels like blindly throwing darts. and those best practice guides assume you already know pixels and events and lookalike audiences. i still don't even know what a lookalike audience really means in practice. also should i learn all google's rules first or just try fb and tiktok and see what happens? ymmv but i doubt i'll be profitable straight away with all the restrictions and algorithms guessing. anyone have a real step-by-step or just an honest take? or should i keep doing small micro-niche stuff and not bother scaling on these big platforms?