I am not a native, and I know this writing is very awkward and ungrammatical.
Can you help me to modify my writing?

Everyone living in this planet is running toward death. In this aspect, all of us are nearly same. Therefore we do not need to compare each other. The only thing you have to think about is yourself.

Accept your life even though you think how pathetic it is. Do not overestimate yourself that will let you down.

Just enjoy learning. It will help you feel wanted from others. Just enjoy helping others. It will make you feel wanted from others, and that feeling will teach you why you are living.