From personal experience, I can say that social media has (to a degree) changed my style and confidence. Since using social media, I've found it hard to know who I truly am and as a result I feel less creative. Social media is great, don't get me wrong but I think that it has become such a huge role in our lives that it has stunted some personal growth that we all need to go through. I truly feel that if I never used social media I would have a different style and different interests.
Back to the original question, how do you find yourself? I believe that in order to find your truest self, you need to detox from life. I am in my 20's and have gone through the stage of not knowing who I am or what I want to be doing. In order for me to find myself, I go back to the days of no internet and get creative. Can you remember the last time you ditched your phone and just truly enjoyed an entire week. I highly recommend taking a solo trip or planning out a peaceful week for yourself. Everyday plan an activity outside or go somewhere that inspires you. I really love putting on peaceful music, opening up the windows and painting on a blank canvas. I'm not good at painting but it is SO relaxing and helps me to calm my mind of all worries. Doing things like this will help you become more in tune with yourself.
Take a day to try different things, write down activities you love to do or wish you did and do them! Imagine your most perfect life, how would you feel? What would you wear? How would you treat others? What would your job be? Whatever it is, make it happen! You have the opportunity to make your life whatever you want it to be. Setting goals and ambitions for your future will help you to be less fearful and more excited for the future. The key to finding yourself is doing what makes your heart and soul happy.