Setting up Google dynamic display remarketing campaign

I want to set up Google display dynamic remarketing campaign, and it seems that I am stuck with the creatives.

What I have:
* Google Ads accounts, with the ability to upload HTML5 data.
* Well configured Google Merchant Center (Retail Dynamic Vertical), linked to AdWords.
* Well configured Google global tag, capturing the ecommerce_prodid as dynamic attributes.

What I need:
I want to launch Google Display Dynamic Remarketing campaign. The creatives preferrably should be created in Google Web Designer (Using just one of readymade Google Ads environment, Retail vertical templates, without modification is OK), in order to have all the bindings required for ads. I assume the campaign type should be Sales > Display.

The project will be succesfull
* When we have a Google Display Dynamic Remarketing Campaign, either (Best way) responsible size creatives, or with a couple of most widespread banner sizes (Like 300*50, 320*50, 300*250) in a single ad.
* When I am able to recreate it myself.

Screenshot of ads that I am trying to launch is attached.