The best life lesson I learned is always be yourself and never copy someone. If you're going to copy some artists or your friends, you'll go not your own way and you'll get the results that you really don't need to. It will be the main mistakes of your life. And if you go your own way, you get the results which really useful in your life, because your way this is the best way that you can have.
Indeed, the best thing to be happy in life is first, love your self. No one will love you when you, yourself does not love your own. Accept you flaws and weaknesses and life will be easy for you. Do not pretend to be someone else rather be the best version of your own self and you can create beautiful and good things in life.