You learn as you go

Some things you won't understand until you experience it. Some things you learn through watching those you know experience it. You can't just assume you know. You can guess but without real knowledge it is a guess that won't necessarily be anywhere near the actual facts. And without the facts then I guess you may make the wrong decision. If you are in doubt then I doubt that getting the facts is no doubt the only decision you should make. If you don't learn before you get the facts then you will learn the hard way that your guess was wrong.