Of course I remember it.
But that’s not an answer to the question.
When does it change and if it’s the literal body and blood of Christ, why doesn’t it look like it?
Good. Then we're getting close to one of your questions. Does the word "Epiclesis" in your Catholic upbringing ring any bells? Or, do you remember anything similar to: Bless and approve our offering; make it acceptable to you, an offering in spirit and in truth. Let it become for us the body and blood of Jesus Christ, your only Son, our Lord.