For starters, I’d say it would be best to take advice from people whose careers and accomplishments are to some extent a matter of public record. Then you can evaluate (a) whether they seem to have actually accomplished the things they’re trying to teach you to accomplish, and (b) whether they seem to have accomplished those things via the procedure they’re encouraging you to follow. If yes to both, then you might proceed further.
In that case, the problem of making good advice seem too easy might come down to a couple of things. First, you want to see a good step-by-step procedure where you can really understand each step and imagine exactly what you’d have to do to achieve it. Second, it would be a red flag if any of those steps seem to be “magic” steps such as “Have a brilliant, lucrative idea for a business.”
Yeah, but it might be useful to know what the person in question considers to have been the crucial aspects of their procedure, as opposed to merely ancillary aspects. This won’t be failproof but will at least have better than chance odds of contributing something useful to the advice.