To take an online course, yes, you probably do. Information on specific hardware and software should be available to you from the Provider institution's website. You need some, but not a lot of experience navigating and using the Internet. Knowing how to download files, attach document files to e-mail, use word processing software are critical skills in an online course environment. If you are uncertain about your abilities, then you may want to enroll into an introductory computer course to sharpen your skills.
Accreditation provides public certification of acceptable institutional quality.
You will find that classes will be using test facilities and test monitors, called proctors, in situations that require standardized testing in order to assign grades. Check with your instructor for requirements in your particular course. Remember that a Student Support Center may be able to offer you proctoring services for a small fee.