The D scale* is one of the next scales you should learn, after the C scale & G scales. The notes are, D, E, F#, G, A, B, C# & D, which is the major scale interval pattern W, W, H, W, W, W, H. Scaling the guitar neck will do you good! 
Play on…
Marlene

*To learn how to play the D scale on your guitar, listen to my newest podcast episode by clicking here!