If there is one lesson that comes early in life, it's the one where we found out that achieving goals never comes easy. The path from start to finish is littered with obstacles, you will face hurdles you never anticipated, and you will question why you chose this path instead of the well-trodden one that would have been a cinch.
Pursuing anything is bound to come with setbacks, you will absolutely experience failure on the way – especially if you're building new habits, learning new skills or changing a big part of your life. This should explain why you never keep your New Year's resolutions.
Now, forget all that because you have (or could have) perseverance on your side. Those hurdles, struggles, and failures need not drain your motivation stores – they don't have to force you out of the game before you really get started. If you have the right mindset then you can do anything – it sounds cliché, but it's true.