Do you already know braille? Or at least, the braille alphabet? Writing with a slate and stylus is tricky, because you need to write in mirror image, moving from right to left and pushing the bumps through to the other side of the paper. I'm not aware of any way to handwrite without a slate/stylus, because it would be near impossible to get bumps to the right depth and spacing. Even a tiny fraction of an inch in irregularity can completely change a character.
$1 is a good resource for writing with a slate and stylus. Watch it, see if you think it's plausible for your skill level, and if you're interested, PM me your address and as a slightly-less-broke grad student, I'll fund a slate and stylus for you.