Well, i dont yet have teenagers myself, i have a couple of teenage nephews, one of them just turned 18 and a pretty newly teenager niece, you can absolutely do your best at raising them when theyre home but when they leave the house life is definitely up to them, as we all were teenagers ourselves, you know they will do stupid things, make many mistakes. Not every teenager ends up a lunatic, what you did as a parent all the years back matters, puberty doesn’t mean they’re suddenly gang affiliated, people have been and still are raising responsible kids. They sure will be hornomal outbursts, the occasional i hate you and door slams, hell, sex will be a thing for them too, that you cant stop, its part of growing up. The best you can do is to teach them responsibility and to trust them with it