The world is meaningless.

There is no God or gods (ugh. grammar Nazi, restrain yourself...), there are no morals, the universe is not moving inexorably toward some higher purpose.

All meaning is man-made, so make your own and make it well. Do not treat life as a way to pass the time until you die. Do not try to "find yourself," you must make yourself. Choose what you want to find meaningful and die for it(;) live, create, hate, cry, destroy, fight and die for it (oddly shown... not sure if that's the intended format). Do not let your life and your values and you(r) actions (your life, your values and your actions) slip easily into any mold(remove ,) other than that which you create for yourself (sentence break inserted). Say with conviction(:)

"This is who I make myself." (This is what I make myself into./This is who I choose to be.)

Do not give in to hope. Remember that nothing you do has any significance beyond that with which you imbue it. Whatever you do, do it for it's own sake. When the universe looks on with indifference, (I give up tracking these corrections...) laugh and shout back: "Fuck you!" Remember that to fight meaninglessness is futile. But fight anyway, in spite of and because of its(it's(that)) futility.

The world may be empty of meaning, but it is a blank canvas on which to paint meanings of your own(context leaves this suggesting that "own" should be used with reference to something, like "your own life." and the poor word placement almost communicates "your own canvas." which isn't sensible.).

Live deliberately. You are free.

As for the message, it really conflicts and contradicts itself, alternatively suggesting a search for meaning, the futility of searching for meaning, a resistance to futility and a resignation to futility.
I am more inclined to believe that the idea of life needing meaning is unimportant. Focus on life and ignore all this talk of meaning, since it doesn't *mean anything.*