The whole world feeling better (improved human rights, overall lifted morale, positive attitude, optimism, love) starts with you feeling the best that you can. As long as you are still hurting you cannot heal others so effectively.
One you have solved your existential problems you can begin taking on those of the world, but your own new problems will never cease to appear and should take a balanced priority to helping others. If you know you're good and truly love who you are, then you can feel confident that interactions you have with others will be progressive, enlightening experiences for all that contribute to the higher goal.
Being who You really are is the answer. Just because it sounds simple doesn't mean it's easy, and just because it sounds complex doesn't mean it's difficult.
You is ALWAYS a beautiful thing. Let others see it the best they can. People like looking at attractive stuff