Promotion of the app and youtube

Hello! I am looking for an experienced freelancer to help promote my app and YouTube channel. The primary goal of the promotion is to increase app downloads, so I am mainly interested in social media marketing and influencer marketing. My target audience demographic is school going kids (16-17). I am looking for an individual who can create a great campaign that will get my app and YouTube channel the attention they deserve. Please send me your portfolio of past campaigns that you have worked on and let's discuss how you can help me reach my goal.