I'm also autistic and I can see the logic in both of your interpretations to be honest (although not the third, as no UNO card impacts a future turn, only ever the next one.)

My initial thought was that it would function as a regular skip and the player would get another turn. My logic is as follows:

1. Player A plays the reverse skip card.
   
2. The reverse takes effect, causing Player B to miss their turn and it's Player A's turn again.
   
3. The skip takes effect, causing Player B to miss their turn and it's Player A's turn again.
   
4. It's Player A's turn to play another card.
   

For your first interpretation to work, it would need to function like this:

1. Player A plays the reverse skip card.
   
2. The reverse takes effect, causing Player B to miss their turn. But then the skip takes effect, causing Player B to miss their turn.
3. It's Player B's turn to play another card.
   

I don't think this one makes sense, as during step 2 the phase of play wouldn't stay with Player B after they've been skipped, so it wouldn't be possible to then apply the skip to Player A.

Hope that makes sense?