HFS Symposium event site

Hello, My company is launching a digital symposium, and I have stepped in to help launch an event website. We would like to launch with selling early-bird pricing. Right now, the website is set up so that the user can complete the registration form and we will send a payment link by email. We need help to allow the user to select an early bird event ticket, complete the custom form, and pay. Our stripe account is already integrated - just need help with how to get the early bird product on the page and go through the form and payment process. I've attached images of the current registration page/form. I'm a novice at Square, and while it's been easy to set up all else, I can't seem to figure out how to get a product onto an existing page without having to go to the actual product page (with very large image -- so bulky) - and get the process set up with the form, etc. After this task is completed, we would like to ask for help porting the registrants into our Hubspot CRM. Thank you!