CHF is certainly a scary thing, but nowhere near as daunting as it was 15 years ago. So please don't pay much attention to some of the death rate statistics you might see on the internet. With the advent of beta blockers and ACE inhibitors, the statistics have improved dramatically, and they continue to improve.
I think you are doing the right thing by asking for help here. Rather than trying to cover all of the bases in this answer, I will point you to a couple of my favorite resources on the topic. (See the source list below.)
The one strong recommendation that I would make to you is to find a heart failure specialist. A general cardiologist might be able to make the initial diagnosis, but you want a cardiologist who specializes in your particular condition. And CHF is actually pretty rare, so you might have to look around a bit to find the right doctor. It is certainly possible to get good care from a general practicioner who is engaged and interested in your condition, but I think you'll find that a bit of consultation from a heart failure specialist will go a long way, as well.
By the way, a chest X-Ray will only catch cases where the heart is significantly dilated. You really need an echocardiogram, or a more invasive procedure, to diagnose cardiomyopathy and determine your left or right ventricular ejection fraction (LVEF, RVEF, or just EF). Typically, an electrocardiogram is also performed to assess the electrical health of your heart, as well.
Take care of your self. With a positive and inquisitive attitude and a willingness to adapt to your altered circumstances, there's a very good chance that you'll live for many more years!
-Mark Moeglein (not a doctor, just a guy whose wife was diagnosed with dilated cardiomyopathy in September 2006)