The breakthrough comes when you learn to relax. Very true of savassanah as well, as that's when you actually have time to think & reflect & freak out a little, esp when you are new at this. You can make it through, & the benefits are enormous!
It will hurt. It will take time. It will require willpower. You will need to make healthy decisions. It requires sacrifice. You will need to push your body to its max. There will be temptation. But, I promise you, when you reach your goal, it's worth it.