OGS has a big problem with beginners if you use automatch to get players of same level to play with you. It will take many games to get rated as a beginner. These games will be painful too as you will be matched with far too strong players by the system. Really sorry on this.
So instead i recommend you to create custom games offers (rated or not) to find more easely games with same level players.
If you still have difficulties to find players you can ask in the chat or post a topic in this same forum
Welcome and have fun!
For more about beginners coming to OGS