Telling your friends and family can be a tricky, nerve wracking thing to do. You have to wait for the right time and atmosphere to do it.
I told my friends in 2015 when I first discovered I was into kitten play and ddlg, the ones i didn't tell found out by finding my Tumblr account. Most of my friends were understanding but some others who I'm not close with in any way just take the piss out of me but they secretly love it because their the ones in my DM's asking for " a good time".
On the other hand my family was quite easy to tell as I'm really open with my family and I tell them everything, their completely fine with it as long as I'm safe and I know my limits.
A good tip I would give is when telling friends and family, to gradually drop little hints along the way, bring little things up in conversation, etc.
If your friends and family wont accept who you are, that can't be helped but at least you tried. And once your 18 if your not already, then they can't stop you doing anything.