When it comes to health insurance, there is no "one size fits all." Ideally, working for an employer who offers non-contributory health insurance is what most of us would aspire to. However, that is not a realistic scenario.
Unless you are in a category considered as "low income" that would afford you access to social health care you can plan on paying hefty premiums. If you have a pre-existing condition, your chances of obtaining affordable rates are statistically very low. But, there are some things you can do. Some tips to bear in mind are:
If you are in that "no mans land" where you do not yet qualify for Medicare, Medicaid or any of the other social programs yet are too old for individual coverage you might take a look at AARP. It can provide a stop gap for that period of time while you are waiting to qualify for assistance.
If you are a young single parent, investigate any subsidized programs that might be available in your state. Many states have programs that will provide care for your children if not for yourself. These social programs are generally based on a sliding scale based on our income level and in many cases visits and prescriptions for your children might be free of charge.