You can sort based on learning progress, which is the pie chart. That effectively puts the ones you know worst, and got wrong, first.
We have some other options for isolating 'wrong' notes coming.
By the way, the lesson is designed to handle this for you. When you get a note wrong, it stays in the lesson, and appears more in future. Manually changing that is probably not a great idea. If the lesson is too big, better to turn lesson scheduling off for some cases until it is manageable again. Set the schedule to None.
The pie chart doesn't quite give me the information I need. So,
I look forward to seeing what options you will include for
isolating wrong notes, since that would work just as well as my
suggestion. I would really like to be able to use an MC lesson to
sort through an imported case and determine which flashcards I need
to learn and which I don't. I could do this manually, slide by
slide, in another view but that would be more time consuming; also,
with the answer displayed right next to the prompt, it would often
be difficult to determine how well I know the answer. Although
there is no easy solution to this right now, MC is still the best
thing out there. I look forward to future versions.