I too think you are kidding yourself with this plan.
You can buy CMU's with a chiseled face that look the same. If you use them the wall can be built and reinforced with re-bar inside the cells and filled with mortar. A cement base/footing should be poured first with "L" re-bar rising from the footing so as to fit inside the cells and be wire-tied to the additional re-bar that will be placed inside the cells ahead of filling them solidly with mortar.
What you are proposing can topple and seriously injure someone. Do you have kids?