Braille

So, I work at a Disability Services office, and I had been intending on learning Braille for personal amusement for a long time. I told one of my supervisors, who is still going through the certification training, that I learned Grade 1 Braille (basically, the equivalent to fingerspelling, pinyin, or kana or what have you.), and that I was planning on learning higher levels. She suggested that I get some formal training and get certified, which apparently is near-free. It also could potentially help me at work ;) Anyone have any experiences with Braille training? There seems to be a lot of resources, so any suggestions for what's best and goes beyond simple letter-by-letter transcriptions would be nice, especially formatting. I'm looking for Literary and Format Braille, though Braille for technical and mathematical texts wouldn't hurt