Mixed ANOVA difficulty ! HELP NEEDED

Hello... im relatively new to psychology statistics and struggling to understand some things.

My experiment is a 2 (common vs distinct faces )x 2 (control vs experimental condition) mixed repeated anova design

The problem is the interaction between the faces and the conditions - how do i further my explanations- through the pairwise comparisons, conducting separate t-tests , post- hoc, simple effect, split data? non of my teachers have actually taught me this so i am a bit confused as to what to do?

I really appreciate any of the advice !!