Speaking slowly will help. You have to tune the activity around you out. Your first priority is the customer at the box. Imagine they're right in front of you. You can politely wait 5-10 seconds after the ding to say hello. Then have a normal, slowly paced conversation with them. Speak very clearly and slowly so you don't need to repeat yourself. Make sure you understand what they are ordering but don't offer to warm up cookies or anything - it makes more work for you and it makes the company no money. Imagine they are in front of you - they are priority #1.

Get the oven going as soon as they order food and quickly walk back to the computer to get the order punched in. When they are done ordering, confirm everything on the screen. This is the time to make sure their drinks are HOT or ICED or SWEETENED, etc... I don't waste my time asking those questions initially. Our menu is standardized and it's the customer's responsibility to learn it and ask for their own customizations. If they don't say "iced", I repeat the order back to them and include the word "hot". If you need to buy yourself 10 seconds, just ask the customer to please wait one moment.

While the oven is running, get all the ordering punched in. Thank them and move on. Until you're extremely comfortable (and I know you're not, you're asking for help), don't get cute. When you're done with the verbal part, go back to the oven, finish the food, and wait. In this position, the customer is your first priority, the oven is second. Tune everything else out. People may shout "I need ice" or "I need vanilla" or something - this is not your role here. Stay in your role.

Your job is to be 1) accurate 2) quick and 3) friendly - in this order. Do all 3 but do them in this order.

It's a realistic task. Just pace yourself and communicate with your coworkers. You can do it.

Advice - speak like 20% slower than normal, memorize the POS screens, and don't walk away from the oven unless there's nothing in it. Always keep the oven in use while orders are incoming. Also, ignore everything else including partners asking you for things.

Well, the way I find it best is making sure your DTR is listening & putting the order in correctly, asking the customer if their order looks correct on the screen when you’re done & while you’re at oven only focus on DTfood. During peak there should be a warmer, if not front should be taking care of mobiles & cafe food.