I am working on a correlation regression project, I need 3 variables. I have age and time spent on social media as my independent, with number of...

I am working on a correlation regression project,  I need 3 variables. I have age and time spent on social media as my independent, with number of depressed thoughts as my independent.  Do I conduct a correlation with all 3?  My correlation is between the amount of time spent on social media with depressed thoughts.