Unable to Upload Sketches to Arduino on Breadboard ATMega328P-PU Using a CP2102

CrossRoads, there are jumper wires at the bottom of the breadboard that connect the VCC and GND rails on each side. The red LED near the reset switch is a power indicator, and it lights up whenever I have the USB cable plugged in. I used a multimeter a while back to check if both rails were working properly and they were fine.

Should I be using any other pins on the CP2102 module? I'm not using the CTS, 3V3, RTS, SPD, RTS, or DCD pins.

Does it matter if I use 3.3 or 5v?