You Didn't Tell Me the Start of My Transmigration Was a Gate

I closed my eyes while fighting my last battle. That would have been my peaceful rest.
But when I opened my eyes,
[Notification: You have entered the gate.] [Verifying user.] [Verified individual ‘Han Seo-Ha (Awakener).’] [Connecting to the system.]
I was in the worst gate, which took three whole years to clear.
“Pack things to eat, drink, weapons, and necessities for survival. Pack mostly canned food! Also, things like lighter and flammable items.”
Forget my transmigration. I should just escape from this hellish gate first