There is a tutorial video standby.......
https://youtube.com/watch?v=KUQe-_6_-0Q
From official forum -
And here is my advice on putting power:
Putting How-To
So here is what I posted in another thread about learning power and distance, see if it helps:
First, you will need to find a fixed point of reference to be able to consistently judge how far back to pull your club. I use the golfer's foot as a reference for how far back to pull. Some people use the club shaft (shown here). Either way, you will need to find a fixed reference to learn how to pull it back consistently.
To determine power, the % of back-swing is a good place to start but, adjusting the marker for an aiming spot, the way you would do it in real golf, is also very important.
So, for a flat put, put the marker about 2 feet past the whole. For an uphill putt, put the marker 2 feet past the hole plus about 1 foot for every 1 inch of elevation. For a downhill putt, leave the marker on the hole for 1 or 2 inches of decline, but for anything more than that, move in toward you, 1 foot for every 1 inch of decline beyond 2.
Once you have adjusted the marker, use the method where, if the putter represents 101 feet and your putt (distance to the marker) is 50 feet, pull back roughly 50%. Then you can adjust a smidge and use the golfer as a reference point (club head at the back of the feet, front of the feet, etc.).
If you use this method you should get the feel for it in no time.
Let me know if this helps.