Add files and fonts to an order

Hello Everyone
I want to create a website for a company that offers personalized engravings. I have already started creating a website with Wix and Editor X. Now I would like to allow the customer to attach an image file to the order or that a font selected by the customer from an embedded html code is submitted along with the order. I do not want to use a third party plugin if possible. If the transmission is not possible with wix or editor x, I can also set up a small server to which the additional files for the order are sent. However, all images and fonts should still be visible in the customer’s shopping cart. Is this feasible? Thank you very much.
Greetings Jonathan

Describe the STEPS of your setup.
Show some pics for better imagination, what you have in front of your eyes.

If you wanted to customise your SHOPPING-CARTcompletely, then you would need to make up your own custom CHECK-OUT-PAGE.

Can i generate a completely CUSTOM CHECK-OUT-PAGEyes!

You will find some possibilities (when it comes to work with Wix-Stores-APP) to make some customizations here…–> use the Wix-Stores-Backend…

To be able to attach an image-file to the order, well everything what you can do with store-orders…

…take a look which possibilities else you have…

This is all what you could use for your purposes…

To add directly some pics or files, you could use an HTML-Component with an integrated File-Selector.

But because i do not know your whole setup → it is a bit difficult to provide more infos.

For sure what i can tell you → you have a lot of CODING infont of you, if you want to realize your wished functionality.