The monthly payments of course depend on how much you owe. I currently only have about $800 left to pay off on mine, and my monthly payment is only $25. My interest rate is 20-something percent, so I try to pay extra as much as possible. When I had more on it (around $2,500), I think my monthly payment was around $70 (I forget exactly, because I was paying around $100 or more a month on it to quickly get it down).
This credit card minimum payment calculator may be helpful to you in deciding if trying care credit is right for you:
http://www.bankrate.com/calculators/managing-debt/minimum-payment-calculator.aspx (I just tested it with my current regular credit card's amount, interest, and minimum as well as with my care credit and it comes out with an accurate minimum payment. I am not entirely sure, but I think stuff like minimum payments are regulated by federal statute, so it should be uniform).
Also, Credit Karma gives out free credit scores and tracks your score for free (unlike sites like
freecreditreport.com where it's only free for a limited time). You can also plug in a loan you'd like to get to see how it would impact your score. I use it all the time:
https://www.creditkarma.com/help/howitworks