I did take all of the advice I've gotten here into consideration, so thank you all for that. One thing I did do yesterday was to reach out to an acquaintance who had gastric sleeve three years ago in a neighboring country. Apparently, she did go through a local doctor who sent her to have surgery overseas but closer than Poland or other countries in Eastern Europe. And it was all paid by the national health insurance.
This doctor is an obesity expert and runs one of the two programs in the country that's recognized as adequate preparation for weight loss surgery, if you want to try to get the national insurance to pay for your operation. It's not on an inpatient basis, which is a plus. When my acquaintance did it, the wait between the prep course and the surgery was only three months, but it may be longer now.
I did email the doctor to ask for an appointment, but I have no idea if they're accepting new patients or if they have a long waiting list. If they're like other doctors, they'll be going on vacation soon and I may not get an appointment until the fall or later. And I may not qualify for surgery paid by the national health insurance, since their general rule is that they operate on people with BMI 40 or higher, and mine is 37.
As I understand it, they may approve surgery for someone with a BMI under 40 if they have enough co-morbidities. I have high blood pressure and the slightly elevated blood sugar test. I don't know if that's enough, but I guess I'll find out. If I don't qualify I probably won't be able to go to the hospital in the neighboring country that my acquaintance went to, since It's not a private hospital. At least, that's what she thought.