Easy first songs?

Hi. I've been playing and practicing the clawhammer strum (finger, strum, thumb)for a few weeks now. I've begun adding a few chords, but there must be something "fun" I can work on during my practice along with the CH strum. 

Is there an easy tab song I can start playing? Would you even recommend I do this? If not, how long should I practice the strum before I move on to a song? In short, I'm really enjoying this strum and sound, and I don't mind practicing it for long stretches of time, but is there something I can also do?

Thanks.