Don't pass W, A, S and D to the clone, and use a macro somewere like this to make him follow:
Code:
/target "main"
/follow

I started with using focus. It's not the best solution, but it wil get you going. Using fokus to attack go something like this:
Code:
/fokus "main"
Code:
/assist fokus
/cast "Big spell"
When you start you use the set fokus macro to place your main as the fokus. Then when you start to fight the toon wil assist you.

More good tips can be found here (Used the macros from that guide myself when I started.)

You realy need to learn how macros work, since a big part of multiboxing is making good makros that work for your playstyle. At low levels you can "borrow" others settup to get going, but as you lvl up you start to write new macros that work better for you.