Hey Orlic,
I know exactly what you mean, marketing my game is something I'm really not looking forward to!
This is what I've learned so far following Indie devs on Youtube/blogs etc:
It helps to have a Twitter/Fbook/Insta page to share Dev progress/news before actual final release of your game.
Some people have done well running a Kickstarter campaign giving early access/rewards etc.
A well produced promo/trailer that instantly catches the eye also helps, plus you should have one already linked from youtube to your Googleplay game page.
Hope that helps.
Good luck!