We would not recommend inexperienced players from attempting to install pickups themselves. The work itself is relatively straightforward, you are just removing one component and replacing it with another, but it often requires an amount of electrical knowledge. Most of the time when replacing a pickup you will need to solder the new one in place. If this is something that you feel comfortable with then replacing your pickup should be a fairly straightforward process. However, to get the job done correctly the first time we would always recommend taking your guitar to a professional.