In order to compete in RivalRyze and view your statistics, you will have to expose your game stats. Here's how:

1. Step 1: Open Dota 2

2. Step 2: Open your Dota 2 setting by clicking on the settings cog located on the upper left corner

3. Step 3: Navigate to the "Social" tab

4. Step 4: Ensure that the "Expose Public Match Data" is enabled

Once your Dota 2 match history is public and linked to RivalRyze, you're all set to join challenges, track your progress, and compete for rewards!