Marking him is the very first technic you need to master. This is the bases of all hand jobs at you not only learn how to touch Mr. Victor gently you will also learn how different parts of Mr. Victor can be manipulated to his pleasure. Please keep asking him if the pleasure is okay – not to tight or to light. Also get feed back on the speed, there is a fine balance between too fast and too slow.
However, if he too busy moaning and granting, then you are doing the right thing thus there is not point in distracting him. Continue doing what you are doing and enjoy every minute of it! If he finishes (ejaculates) at this point don’t worry you will try the other steps on a latter date. Just be sure he doesn’t mess your hair!