When it comes to marketing yourself and your music, creativity is key. One of the best ways to get attention to your music is by working with content creators. People that do podcast, vlogs, tutorials, twerking videos etc. are good ways to get your music noticed by new people. The more influence or followers a person has, the greater chance you have to reach more people.
You could ask your friends to post a video to their Snapchat or Instagram stories playing your song in the background. If you know anyone that always makes videos, ask them to put your song in the video. The key is to get your music heard, subtlely. Most people like being the first ones to discover something that others are still sleeping on. Nobody really likes to feel left out or out of touch with whats going on. Use this to your advantage!