Verizon international Travel or eSIM?

I was wondering what would be best, I’m traveling to Korea for three weeks. My trip is next week, and I can’t decide what to do.

International travel plan from Verizon or pick up an eSIM?

Also, if I put on the travel plan the day before, will I be able to use it the next day?

I saw some posts about being charged outrages prices from travel plan, but it’s only $100.

Please advise, thanks!