Need Some Help / Advice

You might check into some custom made dresses since the dress would otherwise be sized for your bust but have to be tailored to fit elsewhere. Try bing.com copilot to check for custom dress services or check etsy or other sites for some nearby seamstress/designers. Have you figured out some details of the dress you think would work well?

If you will be going to a traditional wedding dress shop/salon/boutique, the staff there should be very helpful! They are knowledgeable about which types of dress styles compliment different body types, and what is possible alterations-wise to make a dress best fit your body. There's certainly nothing wrong with doing research beforehand, but I think you'll get a lot of value from telling the person helping you at the dress store that you are looking for a dress that works well with a large bust while also flattering your figure.