Programming to a square space thank you page

You must be a square space developer with the ability to do excellent coding. We are looking for someone to . First bit of code we need is to push all the order details on the Thank You page to the DataLayer. The details required are: Order ID/Number Order Quantity Order Total Customer Email address This is so that we can use Google Tag Manager to control all the conversion pixels and make sure that we are recording accurate order totals for all conversions. The standard squarespace thank you page cannot be amended at all and so we need to set it up so that once someone has purchased they are automatically directed to a thank you page of our own. Therefore we need to: Setup a redirect to our own thank you page Create a new thank you page using the same header and footer as the rest of the site. For now display onto the page Order ID/Number Order Quantity Order Total Customer Email address These details will also need to be sent to the data layer as already mentioned. If possible we would like to create slight differences in this content based on variables such as order value (or quantity), and cookies. Please have this set up also. Once this is completed we can add additional content to the page and will instruct if we need any further work done.