How difficult would it be for a novice to figure out how to replace Valve cover gaskets on a 3.0 liter V6 Toyota engine?

Update: it is a VZE engine
Update 2: the service adviser at Toyota wanted around $ 400 to replace both. and a local garage said $ 350 plus the part. so how much are the valve gaskets? and what if want to replace intake manifold gaskets too? I am eager to learn how to do stuff like this , I know it requires 1. concentration and 2. patience and 3 .... show more the service adviser at Toyota wanted around $ 400 to replace both.

and a local garage said $ 350 plus the part. so how much are the valve gaskets? and what if want to replace intake manifold gaskets too?

I am eager to learn how to do stuff like this , I know it requires 1. concentration and 2. patience and 3 . the right tool
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