Too ambitious, no, sorry. You always have to push yourself harder and harder or other wise,-
We don't learn what was wrong We don't perfect our techniques And we won't realize our full potential,
This is a valiant effort and you obviously know what your doing and you wanted to push yourself. A pat on the back and move on. Try again. Plus, you shared what you realized was wrong and what saw the mistake so others who might learning this technique can see and learn too.