on a platter

[Pidginboy]

Your life is not something offered on a platter.

Does it give the meaning that life cannot be built to give only comfort and happiness, and so it is a package of trials and tribulations, along with comforts and happiness too? If the above sentence does not mean this, how can one express this idea?

 

[Starfrown]

Your life is not something offered (up) on a (silver) platter.

It means that you have to work for what you get in life; no one will give it to you for nothing. "On a silver platter" is a common idiom.

For an idiomatic expression that means what you intend, try instead:

"Life is not a bed of roses."