If you are in the queue for a while 3+ minutes, and you aren't in the top 50 players (legendary), then you get to play the AI.
If a player if available, the computer will generally match with them instead, regardless of rank.
Even if you play a "1" rank, it is a good way to learn.
Most players will give you advice, if you ask.
If you aren't sure, a good way to check is to try interacting with them during the game.
Send glhf and see if they reply.
YOu'll soon learn the AI names. Some are obvious.