Whooa, SLOW DOWN!!
You've had this little juniper for 1 day. It was only 6 inches high. It should have - number 1, been allowed to adjust to its new home, and number 2, been allowed to grow out for a couple years, then pruned to shape, styled.
Learn about your tree, learn enough to keep it alive. Learn to grow it. Then work with it.
Instant bonsai might be fun - but not gratifying. Patience, patience.