What's a good healthcare provider?

I'm 32 years old. I have had on again off again back pain for nearly ten years. I am always in pain though. It is always at least at a level 3. When it flares up, it can go up to a level 7-9. When I work out and stretch regularly, I do find that I feel a lot better. However, any slight misstep, and I am in bedrest for days! Even when I do feel better, there are certain positions and angles where I happen to be at where the pain is excruciating, 9-10. So, I can work out and feel good, make a very slight mistake, and then I stop working out because I’m in pain. Then, I need to get back in the habit again. That’s where I’m at in life. I’m not a whole person.

Recently...an MRI to finally see where I am at with my back. Well, I have degenerative disc disease.

I can live with the pain, sure, but I am tired of it. I am tired of living like this.

I have never really had healthcare coverage. I have hardly ever seen a doctor, but I want to take some steps in fixing things. Other than my spine and poor posture, I’m in good health and shape, and exercise on average.

So, I’m looking to get healthcare insurance. Ideally, I’d like to take necessary steps to see doctors, get referred to a specialist, and hopefully get some sort of operation to fix things.

...can someone tell me some basics about healthcare coverage? What are some good ones? Basic terminology? What to expect? Best scenario? Worst scenario? I live in Texas, by the way.