Stumbeline,
You don't have to follow the JW line of what an ex or apostate JW is. You don't have to drink, smoke or hook up with anyone if that is not really what you want to be doing.
Get the therapy recommended, but mostly start building LIFE. Get your education started, or at least employment-start moving in the direction you wish to go. Join a book club or a hiking group or a dining club or something that interests you. A wine club or a puppy training class (ok, you need a dog for that!). Start exploring your natural interests, go to a book reading, take up swimming or tennis. . . stay physically fit-it will support everything else.
Don't long for a life you never wanted just because it is familiar. Fix your settings so your mom isn't going to see anything that you don't want her to see on FB.
Please don't fall into a pit. Thats what they want. Even your mom wants you miserable and devastatedso that being a JW looks good in comparison. DON'T PLAY THAT GAME.They will win.
Best wishes.