Accept the fact that the achievement of your happiness is the only moral purpose of your life, and that happiness -- not pain or mindless self-indulgence -- is the proof of your moral integrity, since it is the proof and the result of your loyalty to the achievement of your values
-- Ayn Rand from Atlas Shrugged
Do what you enjoy
Follow your bliss - a way to be "selfish". Pursue what makes you feel good. Focus on what brings you joy. This will align your vibration with your desires. This will get your creative juices flowing. Your actions will naturally flow from this to manifest your desires. Have fun with it and it will snowball and feed on itself. Focusing on what you want is many times labeled "selfishness", but is ultimately unselfish as you find meaning and purpose through contribution.