I'm assuming you would like to shoot instinctively, which means you don't use bow-sights, the point of the arrow, or any other point of reference on the bow or the arrow to aim. When you shoot instinctively, you aim by focusing on the spot you want to hit. Your rear sight is your eye, which I guess in this case is your left eye, even though you are placing the nock of your arrow under your right eye. This will probably work out fine for you. The instinctive part is your front sight, which is really your bow arm. It is instinctive because you are not paying any attention to where the bow arm is pointing. You say you "have no idea if I am holding it in same spot every shot." That's okay! All you should be consciously doing is focusing on the target, pushing with your bow arm, pulling your string elbow back until you come to full draw, and releasing the arrow. I'm not even sure I'm consciously aware of releasing the arrow - I think most of the time I'm only aware of that after the arrow has been released.
The important first thing in instinctive archery, all archery really, is developing good form, because good form allows you to do the same thing shot after shot. If you can do the same thing shot after shot, your brain will eventually learn to put your bow arm in the right place to make the arrow go where you want it to go, without you having to think about it.
Good form dictates how you hold your bow arm, how you draw the bow, how you anchor, and how you release the arrow. You may be able to learn this from books, or you may be able to find someone who can show you, but you have to do this or you will never be able to shoot well. You are right to ask questions about your bow arm, because how you hold the bow and push with your bow arm as much as you pull with your string arm is critical to good form. It's just not important that you worry about where your bow arm is pointing; if you shoot enough arrows with good form, that will take care of itself.