There is something to be learned from all styles of music. You really can't go wrong with the Rock approach, as that will apply to most songs you like to listen to and learn to play.

However, the blues and country stuff is in there as others have mentioned. You will find how much common ground there is in all three of those styles so it never hurts to work through all 3 either separately or simultaneously.

Either approach, you are doing the right thing by playing consistently and practicing. Keep it up :eek: