Here's an image from yesterday's Customer Resume of first-time buyers purchasing in December 2019.
In my work, I have nineteen channel-based variables, twenty-nine merchandise-category variables, and ten additional "attribute" variables. In your project, instead of it saying "Channel 01" it would say "Email" or "Social" ... instead of it saying "Merch 15" it would say "Widgets".
I like to look at "what" a customer buys in the future, and I like to look at "where" a customer purchases in the future.
In this case, customers distribute future volume across Categories 2/11/16. These categories are the "gravity" of the brand, they are the categories that customers generally prefer. The majority of your marketing efforts should focus on those products, of course.
Here's the Customer Resume for first-time buyers acquired in September.