Dyeing your hair is easy using home color kits. Simply follow the instructions on the packet. If it's the first time, try a semi-permanent color that will wash out.
Get hair color from store/beauty supply. Read instructions on or in box. WEAR GLOVES and shirt you do not care if it gets DYE on it. Apply with even saturation.
You can definately color your hair yourself! Most drug store hair dyes come with specific instructions for this. Make sure you read them carefully to ensure a quality dye job.