First shift answering phone calls

First shift answering phone calls First time posting here but I really need some help. I've got myself my first job at a pizza shop nearby and I found out I will be answering phone calls on my first shift next week. I feel like this is something that can really help with my confidence in talking fluently and that I will be able to do it. However, there are some words like 'dollar' and 'delivery' that I know I will struggle with saying. Does anyone have any advice or tips I can use to pronounce these words and not get blocked?