As we draw the comparison to martial training there is only so much someone can help you through explanation and word. At a certain point there is no more use for words and the only thing left is action. So do your learning. Read books. Watch instructionals. Get personal instruction. But mental training is only half the battle. You have to put in the work! Get physically involved! Much like the blacksmith's apprentice watching can only take you into a mental understanding of the techniques. It will never give you the experience as to how performing the technique actually FEELS.
So do me a favor, I want you to get up out of your chair or step away from you desk right now and practice your jab.
How does it feel? Is it a confident jab or are you still wondering what a jab is? Is your arm extending straight or is your elbow flailing? Do you have a stance or do you look like you are waiting for a bus?
Go on. Practice! It will do your jab much better than sitting here reading!