As tempting as it may be, please do NOT have anything to do with the dog - as in “training”, etc.
It can easily come back to bite you in the ass quicker than a Devil Poodle. First off, it’s not your dog. Second, if something ugly should happen in the future re: the dog & there’s evidence that you were friendly with/working with the dog, don’t think for a nanosecond that that info won’t hinder you having a leg to stand on re: a complaint. And this will happen whether you have permission from the “owner” to work with the dog or not. It would be yet another nightmare for you just waiting to happen.
Here’s hoping February comes round as soon as possible for you!