Does it cost money to do it online? And how long is the program? And when you take the final test do you also do it online or do you have to go somewhere??

It generally costs money no matter where you do, unless you do it through a government sponsored program. Where you take the final depends on who is giving the course.

Best to go online and Google GED Online Programs near you. Some are free(?), and some are not, and some will have tutoring, free or paid.

Call an area high school or public library. They will have info about how to do this online, any costs involved, and the test(s). Depending on your financial situation, there may be help available.

Here is a link to the Ohio Department of Education's GED page: GED | Ohio Department of Education

It may be a place for you to start finding out the answers to your questions.