I am very new to guitar and I have very limited musical background. I am looking for some experienced opinions about where my area of focus should be. I am learning chords and starting to get into some very basic songs and melodies. My question is this. Should I keep moving ahead and learning new things even if I haven't completely mastered previous lessons? Or am I better served to sit and hammer one chord change 2 000 times before I move on to something else?

Should I worry about mastering all of the finest details of every point I am taught when I am taught it, or play as best as I can, keep moving forward and work on everything as I move along?

Any feedback is greatly appreciated.