Chest muscle needs reforming

[Septooth]

Ok, I weight lifted a bit when I was younger and when I worked my chest I always did the same exercise...flat bench press. But now that Im older and redoing this again, I realize I should have been switching the angles and types of chest exercises. Most of my chest muscle is up top and more near my shoulders. I never worked my lower chest or the inside of my chest. I need to even my chest out so that it will be solid all around. I see on my last post there was a website showing the different exercises. I dont have a membership to a gym yet, but I have my own free weights at home with a bench that inclines, dumbells and curl bar. But Im not sure If I should start working my whole chest off the bat, or should I work on building up the lower inside of my chest with the rest of my chest and then concentrate on the whole chest area? What exercise would you suggest on building up the underneath and lower inside of my chest?