Mailchimp Retargeting Question

Hi.

I'm still learning to use the mailchimp platform and I'm finding it a bit frustrating. I just ran my first campaign. It was sent to a very small list so I didn't expect many sales. I got zero sales, and that's ok. This was just a test run.

But, here's the thing. I ran an automation, and once people clicked the button in my emails to go to the sales page, I arranged it so they wouldn't get any further emails from the campaign.

I quickly realized that after they clicked but didn't buy I needed to retarget them. But, I'm clueless as to how I can do this.

The offer was for a program on the Ruzuku platform. Ruzuku integrates with mailchimp to add people to my list, but not for retargeting. So, I'm guessing I need a shopping cart on my website that I can integrate with mailchimp in order to retarget the people who go to the sales page but don't buy.

Is this a correct assumption? And if so, what shopping cart might you recommend to a non-techie that's free or really cheap (I can always upgrade later) that I can integrate with mailchimp? My site is a wordpress site. I'd be selling programs, digital products and services from the cart.

I appreciate your help. It's been very frustrating watching my emails go out to less and less people, and not being able to email those who didn't buy.