The first exercise is called spider finger. This exercise will help you build your finger muscle and stretch your fingers. Many Youtube videos shows the first exercise of playing a C or a Em chord but this will help you to be more developed guitarist faster.
Practice this exercise for a whole week. First you will face some problems but after a week you will get better. This is the most booring and painful exercise to learn the guitar but if you can master it you will be a great guitarist.
You can try various other combination of the exercise.