D.E.
I was an STNA for 10 years. There is no such thing as a CNA (certified nursing assistant)
When I started, pay was crummy around $7 an hour :( I believe my last job was well over $10.
You will most likely work in a nursing home. It is a HARD very physical and emotional job. Unless it has changed, the state law is that you can be responsible for 13 residents during your shift. Depending on the type of unit you are working on, it can feel darn near impossible.
However there have been changes, and some really "good" nursing homes try to make sure you never have that many residents. Do not pay for this course, look around and find facilities that provide the course for free and then offer employment. I used to be from the area you live in, and have heard Villa Camillus is a good facility and they used to offer the course, check them out. You can also research facilities on line to get an idea. I will also offer this tip, if you enter a facility and it doesn't smell clean, it's not. Don't work there!
It can be very rewarding, but as I said it is a hard job. You will work!!! And if you don't a have genuine compassion for the elderly, it's not for you. Many of these people have dementia, Alzheimer's etc and can be quite challenging. But they can also be very loving, and a joy to be with.
Good luck! And really think it through. It is not a field for everyone!