Use VBA to populate Line Charts (Was Scatter Charts)

In my workbook I have Sheet1 with some sample data.
Column A is the "PlanName", for every instance of "0250018_REV_E_1" I want to use data from Column C and D to populate Scatter Charts based on the PlanName of Column A.
For every PlanName change, create a new worksheet/chart.

Column C data "2021-02-08T19:03:53.3989786-06:00" can be broken down as:
2021-02-08 (Plan run Date)
T (can be ignored)
19:03:53 (Time as RunEnd, the rest of the string for time can be ignored, "3989786-06:00")

Column D has been converted to H:M:S (In these examples, they are all M:S).

In the chart example, the first instance should have a label of "2021-02-08 19:03:53", preferably in the Y axis stacked.
(Assume rotated 90 degrees)
2021-02-08
19:03:53
(See attached image)

I am able to step thru rows of Column A, but I don't know what to do to collect the data based on the PlanName and not mix data.

I'm not looking for solutions, Id like to make this a learning experience if some one is willing to help me along on what I should do, read, attempt, etc...