Creating a site like Stitch Fix

[asterly]

Hi! I'm looking to start a store offering a "try before you buy" store, where customers fill out a quiz and we handpick a box of items to send to them. I'm comfortable with Shopify and I know how to set up a lot of it, but I have a few big things that I haven't figured out, and I'd love your ideas!

I'm looking for a quiz platform that I can use, it doesn't have to recommend products on its own. Right now the option I'm considering most is Typeform, are there other suggestions?

How could I offer a page for customers to purchase more of the items they received?

What should I do about payments? Can I collect full payment upfront and refund when items come back or would that cause issues?

Thanks in advance!