Need to count string and total with string in another table

Hello, 

I am working on a report with many sources and am having trouble totaling the number of tickets a person is assigned and assists with. 

One of the main relationship in the report is from my table 'Resource' and column 'UserName' which holds a persons First and Last Name (Jenny Smith)
The source with the data is the table 'SupportTickets' and using the columns [Assigned to] and [Tags] 

If a name is in the [Tags] then that means they assisted the person who was assigned the ticket.
The columns with [Tags] contains the first name and last initial of any user within the 'Resource'[UserName].

Difference in name display example: 

'Resource'[UserName] = Jenny Smith

'SupportTickets'[Tags] = Jenny S.

What i would expect counting the sum of 'Tags' to look like if it were in a table (numbers are just for the example)

The next step would be to combine the two columns

The final result should look like this

I am still fairly new to Powerbi, to that i mean i only have basic experience creating and useing DAX measures. If possible i would like to stick to that method.

Thank you in advance.