At this point, every single American's personal info is on the dark web. Freeze your credit with all 3 bureaus and thaw them when you need to run your credit (loan/credit card/mortgage application, credit limit increase, etc.).
If you're an American abroad, use a VPN when signing up and logging in to avoid running into problems.
After you've done that, remove yourself from data brokers' websites. I like the free version of Optery for this but it does involve some legwork on your end (the paid version does everything for you). Data brokers are private companies that buy and sell your data and put it out there on the internet for everyone to see. It can include info like your home address, phone number, email address, names of your relatives and their data, etc.