Marketing advices

Hello,
I'm the creator of an app called Teamsight (https://teamsight.gg).

Here are the important things to know:
- I'm the only person working on this project, my funding is VERY limited
- My target audience are "amateur League of Legends teams"
- The app went through a closed beta and is now ready for launch

What I'm looking for are advices on how to market the app. Should do ads? If so on which platform? Or maybe create some events to get my name out there, etc..