I recommend first doing small exercises with chakra control, chakra build up, and purely the amount of chakra you can use.
This motion is often used to concentrate chakra, and many shinobi are seen initiating simple, basic techniques as well as few complex ones after making this seal.
For example, Fire Release often ends with Tiger, Earth and Wood Releases often end with the Snake hand seals.
Libras are also very social.
In this case, the hands are meant to resemble a tiger.
The secret stays in the position of the hands and precise use of the fingers.