You use "do" in your question when you are asking about something in general. "Do you enjoy your classes with Anna?" "Do you enjoy going to the park?" You could possibly say "Do you enjoy eating that?" if you don't think it looks good and you are incredulous that someone is eating it. You would use "Are you enjoying your meal?" if you are asking someone who is in the middle of eating. A waiter might say it to customers.

(Do) asks about the physical activity. Do you play soccer? (Are) asks about the state of the person. Are you a soccer player?

Do you enjoy your meal? You are asking about enjoying your meal in past experience. are you enjoying your meal mean are currently enjoying your meal that's the difference otherwise meaning are same.i think this Will help you