Wrong page comes up first when visiting website

I am helping my boss with his website. I want to learn how to change the first page that comes up when we enter his website url: jimmharrison.com His Blog page comes up but we want it to be his Main webpage. I have been viewing all his pages but can’t find how to change which page comes up first.

I am sure this is probably an easy thing to do but I am struggling with it. Any help would be MOST appreciated.

–Jane