How to create a catalog page without e-commerce structure

Sector: jewelry

Niche: custom rings

My site is the reference point for this niche in Italy.

I do not sell the product directly.

The potential client contacts me through the contact form-whatsapp or call.

There are some keywords related to my product of users coming to my site but then I "lose" them.

An example of a keyword: gold signet ring

There is a specific page I created on this keyword and it ranks well.

This page covers only one intent: information.

I explain how to choose a gold signet ring: shape, finish, style, etc.

But since I don't have a shop, I can't then push them to buy my product, for example, my collection.

So I'm losing those who arrive with the intent to buy.

I had thought of inserting on this page a catalog of gold seal rings ready to be sold, without customization.

Question 1: As you see it, is it a good idea to add a catalog on this page?

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Question 2: Should I include a PDF catalog for the customer to download or upload a single image for each ring on this page?

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I don't want to create an ecommerce, at the moment it's not in my priorities and goals.

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Thanks for advice