California lets you start whenever you find a lawyer with 5 years good standing willing to take you. Other states require a year of ABA law school first. California requires 4 year internship. I dont know the length of the others.
I say go for it. You might not pass the bar, but I promise your education will be better than from an online degree. Afterall, you'll be in the heat of it doing the real thing with people who had to pass the dumb thing themselves. Of course they'll know how to prep you for it since they did it. Can you say.....DUH??.....If you can do it, then do it, go for it man.
Problem for me is I dont know anyone that would take me for it. Mabey you do for you. Also, you could still do an "executive JD" or hell even that novus law school if you want to risk the waste of money on it. Point is, you can still read the books and take the course online and be in it too. Plus that way you dont have to worry about grades, just the real stuff.
Also, they have bar prep course. You can take those and learn more in them than the full JD degree as far as bar passing goes. Think about it, we all took the LSAT here. Those who took the LSAT prep course did the best. Common sense says the same thing applies here.
Good luck. Let us know how it progresses for you.