If this is the first time you are doing something like this, I would highly recommend paying a mechanic or working along side a friend with experience. There is so much more to pay attention to that it is not even funny. Along with what was mentioned above, if you are not familiar with setting valve lash/lifter pre-load, you are in for an experience in noise with changes in engine temperature. Also you will not want to mix up the push-rods and rocker arms when you take them out. This could go on and on of things to pay attention to. We didn't even mention checking the block and head(s) for flatness and if any machine work to the head may be required.
If you have to ask this question, again, I would recommend not trying to do something you are not comfortable doing because it could cost you more in the long-term in time, money and aggravation.
Someone could explain this to you step by step and still leave out something material that could cause problems for you. If you do decide to take on this task, you will learn why it costs a decent amount to perform the job correctly for long-term reliability.