I was in a similar situation a while back. Here’s what I did (it’s debatable what the best way is)
It turns out you’re still going to have to go easy on lessons for a long while even once the review count gets to zero, because you’ll have a big Guru pile full of leeches piling on you every day, and you don’t want to add too much to that. It was about 6 weeks total for me to be back to full speed ahead. With that considered, it may not be that much faster than a reset of a few levels, to be honest, but at least the speed is in your control.