Head on over to WhaleClub!
https://whaleclub.co/join/SMAL5
It's easy to use! Low cost! There's a mobile trading platform! And they even throw in a bonus on deposit!
Up to 200X leverage available!
Just open an account, transfer some Bitcoin or Dash and you're good to go! Easy as that.
The practice account feature is very handy and lets you get comfortable with the UI.
Happy trading!
p.s - Take extreme caution when trading with leverage/margin, make sure you learn as much as you can about it and practice!