It doesn't really matter how the first day of any challenge went, THE MOST IMPORTANT IS NOT TO RUN IN THE FIRST WEEK. Indeed, the most important thing is not to break loose, not to get out of the way, and not to stop seeing the intended goal. After all, who needs it - you or someone? You. That is why it is worth continuing because competing with yourself, achieving what you have planned, is a big deal and undoubted success for your own "I".