Hi Mraie,
If you're working primarily on rhythm, you may want to check out some of these songs: https://www.guitartricks.com/songs.php?input=beginners
If you haven't already, I also suggest watching this lesson from Guitar Fundamentals 1 on strumming: https://www.guitartricks.com/tutorial.php?input=1914
If you haven't gone through the Fundamentals courses yet, I highly recommend it for developing a great guitar playing foundation.
If you're a little more experience, you can check out this rhythm lesson in our rock Level 1 course with Anders: https://www.guitartricks.com/tutorial.php?input=1568
If you have any questions, comments, or concerns, please contact us.