Answer: basically nothing.
So take this advice with a pinch of salt.
From what I have read the consistent advice for all sports is:
Don't return to play until your symptoms have completely gone.

Now I do know something about postconcussion syndrome having had it and I would say that any risk of doing yourself permanent damage is not worth it.
If you get another injury when you are still recovering it is liable to be much worse. You might not be able to recover at all. Then you are basically screwed.

Can you use a padded helmet when you wrestle?

I would be really careful about anything that could make your injury worse.
Sounds like you don't have it too bad and you might make a complete recovery. That means no symptoms at all.
That would be when I would consider going back to wrestling. But please yourself. You don't have to give it up for life, just till you are sure that you aren't going to completely mess your life up for the sake of not waiting a few extra months. You would sure regret it if you took another hit, believe me. My opinion.
CS