We are, on some level, consumed with this question of life’s meaning – and death accentuates it. Our culture (any culture) promises what it can never deliver.
Relax. You were never going to get that stuff anyway and if you did it would not have mattered.
Yu have what you need. You have a life to give back to God and to love others with no matter how imperfectly. And the Holy Spirit has given you spiritual gifts (at least one and probably more) – not for yourself (and this is good) but for the benefit of others.
As you get your own Self (Ego) out of the way and are used to love others with these gifts you will find your life is meaningful – that you are “laying up treasure in heaven where thief cannot steal, rust cannot decay and moth cannot eat away.”
Paul speaks of this as the “hidden life” (Col. 3:1-4). He says that when Christ is revealed with glory your life will also be revealed with Him as the most meaningful life. Do not worry that it is temporarily hidden now. It is hidden anyway.
Who cares? No one for thy are all too busy saying “look at me, look at me!” when they (like me) are just a vapor. You are free to live a meaningful life now. Stop striving after what you cannot keep; embrace what can never be taken away.