I would assume that the goal is to accompany yourself singing. This is a special way of playing and can only be accomplished by having practice doing both.

If this is your goal, learn by playing simple chords as accompaniment to your singing. Forget about scales and isolated techniques. Eventually develop accompaniment patterns with the right hand using fingers or pick.

If you want to branch out later and play guitar as a solo instrument,the effort you put in on playing simply and singing will help your musicianship.

Frank