How do you upload pictures from my camera to my computer?

Most digital cameras will have a Micro-B USB slot, to which they can be connected to a PC using an appropriate USB cable. The PC will then be able to open the camera's memory card as if it were a removable storage medium, you can copy the pictures to your hard drive.

If the camera has no USB port, then you will need a card reader, a USB device that you can insert the camera's memory card into.