You sound like you are full of excuses. Start thinking about how you can succeed.
It sounds like you have an education, get a job that has insurance. And it sounds like you have nothing to lose right now so you really can't fail. Take any opportunity that comes along. Read books watch videos whatever it takes.
I'm not a huge fan of Dave Ramsey but one thing I do agree on is that you need to stop waiting on someone else to take care of you. You need to do it for yourself.
You have no dependents
so even if you do get sick and owe millions to the hospitals so what? Not to mention you are worrying about something that hasn't happened yet.
Having children won't help you either. Most likely they'll have their own debt to worry about. And they are expensive and need their own insurance.
How is going to the KH going to get you health insurance? You know they won't help out if you get sick right? Even your family probably won't help out. Maybe if you are an exemplary JW be even then it's doubtful. Most likely they will tell you to rely on God. You don't need to be a JW to do that.