Banner at the end of posts – products in sidebar with Ad Inserter

Hi everyone! 👋 I’m very new to WordPress.

I’m trying to use the “Ad Inserter” plugin to add a banner at the end of my posts and display a product in the sidebar. I want it to look exactly like the link below (specifically, the green and white banner at the bottom of the article after the green button, and the orange and purple products in the sidebar):

https://modiresabz.com/4-%d9%86%d8%b4%d8%a7%d9%86%d9%87-%da%a9%d9%87-%d9%85%d8%ad%d8%b5%d9%88%d9%84%d8%aa%d8%a7%d9%86-%d8%a8%db%8c%d8%b4%d8%a7%d8%b2%d8%ad%d8%af-%d9%be%db%8c%da%86%db%8c%d8%af%d9%87-%d8%a7%d8%b3/

I’ve tried a lot to set this up but just couldn’t get it to work. 😅 Does anyone know of a good tutorial for this, or where I can find a solution?

Thanks so much in advance! 🙏