Lesson 1 :Learn a scale

In order to become skillful on the guitar, we'll need to build the muscles in our hands, and learn to stretch our fingers. Scales are a good way to do so. i personally suggest you to pick up any scale and keep practicing it. Remember to use all of your fingers (also use the pinky one, don't hesitate, it will take time but once you have developed enough muscles it will b a piece of cake)
You can simple use a CHROMATIC scale to begin with.
here is an image showing how to play and practice