Having figured out the right method, or at least what he believed to be the right method, the rest was relatively simple. The main hurdle was overcoming his mental trepidation. After all, the human mind naturally rejects objects in the vicinity of one's face. It was like if one placed a finger pointing between one's eyes. Even if it didn't touch, a somewhat uncomfortable sensation would ensue, that was basically the brain telling you, "That's dangerous, stop it!"
This was a natural sensation and could be either easy or hard to overcome, depending on the person. For Di Tou… it was alright. It was just the natural anxiety and trepidation in conjunction with the fact it was literally Void Qi which had it's own scary effects that caused Di Tou to hesitate for a moment.