Lied about employment history

So I am currently in trucking school and took out a loan for it, but I did lie about my employment history. I know I probably should have tried to explain during the interview with the trucking school but I didn't and what was done was done.
I don't have a criminal record but I do have a bunch of jobs that I didn't care much for and don't exactly remember from when I worked to when I quit.
What are the chances that I might not get hired with one of the big carriers?
I job hopped, don't exactly remember the dates, I wasn't entirely honest when I probably should have been but that was the choice I made.
I am not too worried about the drug test, the non existent felonies, my license, but the spotty work history and the fact that I wasn't entirely honest.

 

I know I was wrong and I know I probably shouldn't have been dishonest, but that's the choice I made and now it seems like it might come back full circle.
I really don't know the exact dates when I was and wasn't working so I gave approximations. Now those approximations might not line up.

 

Yeah, it is one of those schools that have a partnership with a carrier.
The online application had one set of dates, in the in person interview with the school I gave another, I would be giving another given that I don't exactly remember the exact dates when I worked the jobs I have had. I am early 20s, below 25 but still.
I quit jobs left and right, not a good look.
I am not proud about the fact that I couldn't hold a job for longer than 3 months at all.
After I am done with the schooling, I should be pipelined to orientation, if all goes well.
The job history might be the one thing that does me in.

 

I believe I am pre hired so although I am not entirely sure as to whether I would have a contract with them, it seems as if I would be headed in that direction since the school has a partnership with that company. So although the school operates as an entity separate to the company, the school acts as a gateway recruitment center to that company.