The universe has a beginning. It exists, so it cannot come from infinity (Infinity cannot exist). There is no single purpose everyone must follow and there is no destiny.
Life is inherently meaningless. there is no objective meaning. We derive meaning not from out there—from the physical universe—but in here, within ourselves. Only human minds can create meaning because meaning is a mental construction.
Therefore, the best approach to life is this: Recognize that life is inherently pointless, but live it anyway. Because you can make your life count at least for yourself. You can also live it for others. But be wary that you don’t take yourself too seriously. Create your own purpose, live it, but do not feel bad when things don’t pan out. Live lightly, live in the present moment. Approach life with humor.
Even if life is meaningless, we can continue living it. We could recognize it and forget about it. According to Thomas Nagel, the trick is to “keep your eyes on what’s in front of you, and allow justifications to come to an end inside your life, and inside the lives of others to whom you are connected.”
Your answer to the question: “What is the point of being alive?” could be: “There’s no point. It wouldn’t matter if I didn’t exist at all, or if I didn’t care about anything. But I do. That’s all there is to it.”
Avoid taking yourself too seriously. Avoid going after large goals that ultimately don’t matter. Aspire for mild not wild success.
References
Nagel, T. (1987). What Does It All Mean? A Very Short Introduction to Philosophy (1st ed.). Oxford University Press.