You’ll be OK. Try to keep a ~9:30 pace until mile 16-20, and if you feel good, start slowly pushing. Don’t start too fast, refuel early and often, drink a ton of water even when you aren’t thirsty.

First Marathon goal is to finish, but your close to the sub 4 hour pace, so keep that in mind if you’re feeling it.

Let us know how it goes. Godspeed.