Help needed graphing a count between a date range

I was able to figure this out, details are on this thread.

First, I created a calendar that contains only the first day of each month, and only dates that current or in the past:

Program Active Months = FILTER(CALENDAR(DATE(2018,1,1),DATE(2025,12,31)),AND(DAY([Date])=1, TODAY()>=[Date]))

Then, I used this to produce the table I wanted which showed me enrollee count by client and month:

Active Enrollees = 
VAR tmpTable =  
SELECTCOLUMNS(
    FILTER(
        GENERATE(
            Enrollment,
            'Program Active Months'
        ),
        [Date] >= [Effective_Date__c] &&
        [Date] <= Enrollment[End Date]
    ),
    "Id", Enrollment[Id],
    "Date", [Date],
    "Account", [Account Name]
)
RETURN GROUPBY(tmpTable,[Date],[Account],"Count",COUNTX(CURRENTGROUP(),[Id]))

I hope this helps anyone else in a similar situation.