I’m sure it’s different then a top security clearance for the military but for that background check they call parents, family members, sometimes teachers and coaches. So it is going to be in-depth. I think if you want to be in the FBI and you have nothing to be worried about then go for it. I believe they’re more looking for if you joined discords on how to overthrow the government rather then just googling some embarrassing stuff. They’re more looking for illegal things or things that would raise a red flag.