If you're willing to put in a bit of annoying work, what you can try is save just before you try to do the lesson and if you dont get a decent score then just load and try again... I would aim to increase the stat by at least 6, if not I would try again. In your case, there is quite a large way to go, but I think after a month or so the difficulty gets a little easier (I failed most of my jobs until September?). And I made sure to drop the job before the audition day if I knew I wouldn't make it, that way I would have that day to go to lessons (if you try to go with not enough stats you just waste the day).