Ooh, I don’t really know about that. I’m just 21 and when I got them 8 months ago, I just flat-out told my parents that I was gonna try them(I knew they wouldn’t like it even though I make my own choices). Of course, I did so with respect because they had no idea and they weren’t as open about it. But I believe that us young people shouldn’t really wanna go against our parents, even if we don’t need them. Prove to them that you can make your own decisions in an adult way. Gather information about dreads, and talk to them in a mature way. Don’t show them that you’re upset with them if they say no. A ‘no’ now doesn’t mean you can’t get them when you’re older and your own person. Always respect them…you can’t ever regret that…even if you do what you want later, there’s always a way to do things out of respect. Also, I’d suggest asking them if they’ll let you at least give the dreads a try…and if they don’t work out, then you can always comb them out gently, and with a lot of conditioner. I hope I helped in some way. Good luck!
As far as I know, anybody with any kind of hair type can do dreads. I hear it takes a different amount of time for certain hair types to get mature, but I guess they still can get mature.
It’s really up to you. Short dreads do look good on girls. I myself just took my extensions out after seven months, and now my hair is right at my collar bones. There’s not many updos I can achieve with short dreads, but I does look pretty good down.