Time problems when execute the forehand loop

Hi Alois and Jeff. I'm Boti from Hungary.

I dont play for many years but I've learnt the name of the shots , spins etc. I can lob , chop , do services with high toss and force the ball to turn due to corkspin.

I am a backhand oriented player and can do the backhand loop well with nice, big follow through.

With my forehand I do the chinese style looping (trying to copy Ma Long's forehand).  I've danced (ballroom dance) competitively for about 4 years, so it was easy to understand the mechanics of the strokes, and the body-work.  I can loop well against backspin with really big and nice swings (I like when my shots look elegant, and is important for me).

When I want to loop topspin I feel awkward , I do the backswing but I hit the ball with the edge of my racket. (this happens close to the table & mid distance) Sometimes I do the backswing too early ( I feel that I don't have time to do the starting position, it's really sad, because with the s. position you could reach the forehand and also the backhand balls)  and it's ridiculous when the ball comes to my backhand while my arm is behind me (preparing for the fhand loop ).

I don't know what should I do. Am I too weak to execute big swings in short time? This leads me to acting in haste, and the ball usually go off the table. 

Please help me!

Thanks in advance:D