Stacked bar chart help

I am trying to create a stacked chart that shows the number of studies started per quarter using the baseline start column as a reference and sorted by the 5 existing categories as shown in image 1. Image 2 is an example of the data source I would be using. Is this possible, and if so could I please get some assistance. Thank you!
Answers
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I would suggest using a second sheet. The quarters would be listed down the rows in one column and the categories would be their own columns.
Quartersโฆโฆโฆ.Cat 1โฆโฆโฆ..Cat 2โฆโฆโฆ.Cat 3
Q1 24
Q2 24
Q3 24
Q4 24
Q1 25
You would then use a COUNTIFS with cross sheet references to count how many rows have the corresponding Category and Quarter.
=COUNTIFS({Source Sheet Category}, @cell = "Category 1", {Source Sheet Quarters}, @cell = Quarters@row)