If you're not reading between the lines, IMO, the aiming method you use will most likely be greatly influenced by the direction you are most interested; ie, target archer or bowhunter. Not to say you can't be both.
My suggestion is to start out as a gap shooter, making careful notations, shooting out as far as you like. In doing that you'll learn a lot about you likes as to shooting gap, split or 3under… and anchor. You'll also in not to great a time learn that "gap" can (and does) turn into a near instinctive style, in that little thought is put into the aiming as it has become engrained into your subconscious. String walking isn't for everyone, but it can certainly can be learned after becoming a more experienced proficient archer. Good Luck. All the best.
Tom