My web app is slow

Hello,

I hired a student to create a web app for our tech recycling business. The customer visits the site, selects their device, answers a few questions about the condition, and then we generate an instant quote for that model based on their answers. We are using a MySQL database on a shared web host. The app seems very slow when loading and going through the process. I am not a developer but if there is anything that I can do that might help, please let me know. The developer I hired is busy on other work so I am kind of stuck.

The selling page

Thanks,
Frank