Put yourself in the place of Light, if you received a death note, you could kill people with only 17 years old.
With 17 years his biggest concern is their school grades but to Light Yagami this is not a problem because it is considered one of Japan's brightest students. In the first episode, Light says that the world is rotten, lost. This does not justify you want to be a God and punish people. For example, The Punisher had his family killed by criminals, and this has justified what Frank Castle does.
If they had done something explaining why Light wants to be a God would be great.
But if you skip this part, this will be one of the best anime that you will watch, like it or not Japanese cartoons.
