This achievement is a missable story-related match, which won't be available to you if you lost the semi-final. Additionally, you CAN lose this match. However, please note that you CAN super sim through story games this year...what's more, it won't disable the achievements for winning the semi-final and final!
Theoretically, you could sim through the whole thing and hope for the best, but you would need to be prepared to quit pretty sharpish if you were to lose as there is no chapter select.
To make sure you don't lose, my advice would be to sim quarter by quarter, and if you in the lead or tied keep simulating if you're losing then play for a bit.
You can also opt to just play offense/defense if you so wish (I just played offense when we were behind). The AI is incredibly forgiving in the college games. I probably only played 6-7 series between the two games, and scored 4 hail mary TD's.
If all else fails, it only takes around 15-20 minutes to get to the semi final, and around 30 minutes to get to the final.