How long did you Push?!

Em
36 weeks and I'm freaking out to when it comes to the pushing part in labor. This is my second child but it's been 6 years I feel like a newbie again. Honestly, my first childbirth was a blur. How long did it take you to Push? And what are some techniques in not becoming tired from Pushing? (I feel like I will be so tired I might pass out I'm so nervous)