Compare Average

Hi everyone

I'm totally new with Power BI and I'd like to use it for the analysis of a survey result

So I've some trainers, after each sessions, a sheet is given to the trainees to get an evaluation with 12 points

I'd like to compare some trainers with the average how could I do that?

What I've done,

I did 12 new measure which calculate the total avg for each values

But the problem I have a charts which isn't very readable due to all this values

I'd like to build a table with my Measure values for a trend line and I'd like to group each average values(new measures) with its values for the trainer

Is it possible to do that?

Many thanks in advance for your help