Ditto on what KRAIGWY said. Just go for it.
Some things to have in your back pocket: If you are disabled, don't be afraid to ask for an accommodation. Also, I don't know how you are planning to fund the school but you might see if there are any Voc Rehab dollars out there that may help.
But mostly, I would encourage you to do it. This is not a dress rehearsal - it is the real thing and you probably won't get another crack at it.