You should practice finger excercise first. Play first four frets with four fingers. then move one fret below and play again. Repeat this till you reach 12th post. Then trace your way back. Try to do this as fast as you can
Then learn major chords. Get a rythm and start changing chords without breaking tht rythm. Then cut tht rythm and change in half beat. Learn minor chords and so on.
As learning is non-stop and non-ending process so you might never end. just carry on. 
