I am creating a dashboard for all my development work. 
 
My tasks sheet is pretty standard with Assigned to, Status, Phase, Effort
 
The metrics I am looking to display are: 
- - Total number of days (Effort) per developer
 - - Total number of tasks in a given Status (but exclude some rows in given phase)
 - - Total number of tasks in a given Phase (but exclude some)
 
 
I believe I need to create reports or something to get these values but I am struggling to find any relevant tutorials. 
 
Thank you very much in advance for any pointers.