Yes, there is a learning curve - your first block isn't not going to come out like the demonstrator's block (s/he's done hundreds of them, remember)
But it's not as difficult as learning free-motion quilting. Watch the video over and over until you can see what the hands are doing - coordinating the hand movement is the toughest part. Sew a block without thread a few times before you try making a block.
If you do 6-10 drunkard's path blocks, you should be comfortable and in another dozen or two, I'll bet you'll be zooming along.