Stickhandling is one of the basic techniques that is not as hard to learn. However, it could take a long period of time to become advanced in stickhandling to the point where you could do multiple tricks or dekes.
As you look at the gif of Patrick Kane (Professional Hockey Player) you could see the fast movement of the stick. However, looking closer you see how his arms are positioned and how is hands move. When stickhandling you don't want to have stiff arms or stiff hands because it will look like you're chopping at the puck. Instead, you would want to, "roll" your wrists so your stick moves fluently when stickhandling. Practice having your hands in front of your body and just stickhandling, if it starts to hurt in your wrists then you're doing it correctly.