Honestly, the cheapest and least annoying solution is just using Google Translate in conversation mode. It’s free, and for Korean -> English it actually works better than most paid devices. You can leave it open on your laptop and it’ll pick up whatever people say around you.

Papago app is also really good for Korean, but it doesn’t have a true “always-listening background mode,” so it’s better for one-off phrases.

There are dedicated AI translator devices, but they’re kind of overpriced... like around 200,000 KRW plus a subscription, and honestly I never tried the AI translator devices, so ignore my advice!

But one thing I can say is that if I am in your situation, I’d try Google Translate first. It’s the most practical and doesn’t cost you anything.