Report for Date Entered into a Sequence based on Lifecycle Stage

I am currently creating a report that requires me to tag companies based on the date they first entered a specific sequence.

I currently have a pivot table that measures the number of companies per lifecycle stage (rows). I have filters based on the last sequence enrolled (being the specific sequences I want them to measure)

Now, I want to add the months (columns) which are based on the date the company first entered the sequence

What is the best way to go about it?