Hi Jose,
Congratulations on studying for your CCNA R&S! A great place to start would be checking out Cisco Networking Academy's networking course offerings at https://www.netacad.com/courses/networking. The courses are aligned to what IT professionals use in the field and are constantly being updated with the latest industry information. Once you find a class that you're interested in on the page, simply select the "Learn More" button, which will then take you to the option of "Find an academy" (an orange button on the left) near you. Once you've found an academy in your area, they will be able to provide all of the information you need on fees. Many of our academy's are at community colleges, which keeps the cost down. Another great resources is https://www.netacad.com/sites/default/files/educator-onepager-networking.pdf, which provides information on all of Networking Academy's networking courses on one page.

Thanks, and good luck on your exam!
Sarah Hurd