No, it is not difficult but require a little practice, concentration and for some of them patience!
We will start with basic ones
the snake knot
the double connection knot
Josephine or double cpoin knot
The pheonix tail knot
Snake Knot Tying
Follow the step by step video and you will see how to make a snake knot.
It is easier to understand the tying process with two cords in different colors. So cut two pieces of cord, make a knot and pin this one on a cork board.
Let's start
Take the left cord and put over, under the right cord and under the left cord to make a loop. Pin
Take the right cord and go under the left cord, make a loop going over the left cord, over the right cord and under the pink cord as you can see in the video.
You have now two loops.
Remove the pins and slowly reduce the loop's sizes carefully with your fingers.
Pull tight.
Repeat.
Snake knots has a rounded shape.
Tying A Double Connection Knot
How to tie a double connection knot?
This Chinese knot, the Korean call it "Dorae Maedeup "is made with with two overhands tied into one other.
This knot is extremely steady and strong and aesthetically beautiful with its simple X shape.
Let's see now how to tie it with the video.
Take your cork board, pins and 2 pieces of cords ( big size to start) in different colors so you will see the X.
Tie the 2 cords together with a knot and put a pin on it.
Here we have a black (left) and a pink (right) cords. You can put a pin on the bottom of the right cord.
Take theft cord and follow my hand's movement making a loop to an overhand knot.
Then take the left cord, again follow my gesture and make a loop and the second overhand knot.
Now position the 2 knots in a X shape and begin tithing.
Pull evenly and reduce the knots size little by little.
Then pull the 2 cords on each ends.
Double Coin Knot
How to tie a double coin knot (also called Josephine knot)?
Fold a piece of cord and pin the right side.
Move the left cord and make a loop over the right cord. Pin the loop.
Now, pin the left cord and move it under the left cord and slide it under, over, under, over. We use here a tweezer, it can be helpful during the weaving process.
Unpin and the reshape double coin knot always following the cord's path.
Phoenix Tail Knot
The phoenix tail looks has a flatted shape, different from the snake knot which is more rounded.
Cut two pieces of cord in different colors and make a knot.
Now, make a loop with the right cord, use the left cord to make a loop around the left cord and under itself. Pull the left cord tight.
The key for the phoenix tail knot is to keep cords aligned.
Now, make a loop with the left cord and insert it in the right loop.