I agree with all the other replies here. In fact, I even made an account just so I could post! From what research I've done in the last few years prior to me starting this journey, and even the large amount of managers within the industry I've already spoken to so far, moving from Conductor to Driver is rare, but going from out of the industry altogether to Driver is even rarer. I strongly, strongly suggest you really try to stick it out and tackle it as it comes. Don't take a step back by going to Conductor, you don't know when this opportunity might come along again if you regret it, which I think you will. I understand completely how hard things can be at times, they might make you feel overwhelmed, or perhaps that because there's so much to take in or the responsibility is so high etc. that it's putting you off, however you've got to remember that any steep learning curve would have this same effect. Think about what pilots must go through for example. Keep it up, keep your chin up, ask a million questions to your trainers if you have to so that you can get the end result!
EDIT: The answer to your question OP from what intel I have so far is no, or highly unlikely. TPE just did a recruitment wave for Trainee Conductor's based in Sheffield, Hull, York and Cleethorpes (including qualified conductors) only a few months ago, with this batch of recruits only just starting training around about now.