How do you turn your military credits from your Joint Service Transcript into civilian credits?

You can't turn them into credits, they're recommended credits. That means it's up to the school you select and the degree program to determine how many of those recommended credits they will grant you credit for.

Once you are enrolled in the college you plan on attending. Go to the JST website, login, then select request official transcript, you'll be able to select the school you want to send it to, then submit. Wait a month for your school to receive it and review them.

Yeah! You can fax them to your school's student office and they should be able to apply them as is. However, some schools do not accept them.