If there is a most important component to your PC, the CPU is it. This delicate microchip is the brain of your PC and should be handled that way. You never want to touch the CPU pins, holding it by the edges is the best recommendation. Installing into the motherboard is not overly difficult. The CPU socket on the motherboard is generally easy to find and is covered by a load plate and load plate cover to protect the socket when the CPU is not installed. The first step of installing the CPU is to gently unfasten and life the load plate. The load plate/socket cover should push out without having to apply too much force. Once the load plate is up you'll want to align the CPU with the socket. Intel CPUs have two tiny groves cut out on opposite sides of the silicon which should line up with two notches in the socket. Line them up and gently drop in the CPU. Intel's multi-core CPUs (Socket T/LGA775) are a "pinless" design, meaning they don't have actual pins sticking out that fit into the holes of a socket. Instead they use tiny contact points which align with the socket's contact points. This means there's no need to push the chip or a risk bending any CPU pins. Some older chips, both AMD and Intel, still use the old technology but if you're building a new PC you're most likely using a new chip.
Once the chip is resting in place, close the load plate and secure it with the load lever. At first this may seem like you're pushing down a bit hard but as long as you're using the level and not putting much (if any) force on the load plate everything should be fine and your CPU will be locked in place.