Hello! I would suggest you either take the course from NFB or someone who is certified in literary braille either through a class or an online setting. You are free to do the course at your own pace but without a certified transcriber/instructor reviewing your work, how are you going to know if you are brailling the lessons correctly? You are free to send in a manuscript on your own (that is, without being affiliated with a transcribing group) ... but NFB is going to want to know who you learned from, or how you learned. Where did you get your materials? Did you register with NFB prior to strating the course? If you are concerned about the time involved to get the lessons evaluated, it is very minimal if you are part of a class, either in a classroom setting or online. Let me know if you have any further questions. I would be happy to answer them and/or work with you in preparation for obtaining certification.