Changes

When standing, the strap is typically slung over the head and rests on the left shoulder- the strap crosses the back from the right hip to the left shoulder where it extends straight down to the front or horn strap pin. This prevents it from falling accidentally, and most guitar manufacturers balance their guitars so that when slung this way, the neck doesn't dip too much. A natural inclination may be to think the guitar's body should be centered in front of your body, but really it should rest on your right flank/ribs/hip. Your left hand should be reaching slightly away from your body.  Another inclination is to sling the guitar low, which looks super cool. Some people can pull this off, but I am not one of them. It kills my left wrist and greatly limits my playing ability. I don't think anyone should start that low. Sling it so it feels similar to sitting down or only slightly lower. As you gain comfort, you can start to lower the strap.