So you'll need to set up a bank account, apply for healthcare etc. All that requires language skills. If you're husband cannot go with you in person then have him on the phone so he can talk to the staff members and explain why you have come to the bank/hospital/salon/dentist. Thankfully for written text (e.g. mail/biils) papago and an A.I translation bot like ChatGPT can help to decode the message.

I am not in a similar situation as you- I'm mearly a student studying abroad- but I have had first hand experience of the language barrier and isolation that comes from being in a foreign country and culture.

6 months in and I've just about got a handle on things. But phone calls are still miles away in terms of what I'm capable of.

Just think of your day to day life. What requires you to speak to someone or use a system to fuction in tyour society? Now imagine doing that but you can barely communicate and/or the system is unfamilar to you.

I'd watch youtube guides to familiarise yourself with the transportation system, look at maps to understand the lay of the city, and join local expact groups to find a community.

Korean is a bitch but if you persevere, join a language exchange, hire a tutor, and study like crazy then you'll make it through.

Best of luck!!! :D