I'm so sorry you struggle with that. My skepticism began as a small child, and disbelief was gradual and pretty much established by the time I hit my teens. During my childhood, though, I had a close relationship with my nearby grandparents who made a real project out of the salvation of my immortal soul, so I was exposed to frequent Sunday school and Vacation Bible School at their fundie Christian church. To be honest, I always found the idea of an all-powerful and judgmental magical being hovering over and focused on me to be quite disturbing and intimidating. I found it anything but comforting. Once my deconversion was complete, comprehending my own anonymity was a blessed relief.

We all are self centered regardless of religion. I think it's just human nature. We have to think about ourselves first because we are ourselves before anything else..... We just have to let it take control of ourselves in the right measure.

Geeze, I never felt like part of the grand plan even when I was a Lutheran. So I've not had to change a thing. I'm cool to go

It's so much more pleasant to accept randomness than the idea that god wants you to be in pain or suffer in a deliberate attack on everyone around you so you can learn a lesson.

I've known some atheists who are very pessimistic and depressed and cynical. Make the choice to keep seeking things that bring you joy instead of worrying about the vast meaning of existence of all humankind. Your "mind fuck" is thinking there's either God's plan, or random indifferent chaos. There are many other possibilities to discover if you seek them. There are patterns in the universe, there is an order to things, sometimes it is cruel and indifferent, sometimes it is warm and joyous - but the bottom line is - people will see what they choose to see. Seek good things, and you will find them.

While I was raised to be religious, I never felt like I was a part of God's plan and I certainly never felt I was the center of the universe. I've honestly never considered that some people may have been taught to think that.

As scary as it was for me to make the leap away from religion, I knew it wasn't real. I think having the framework of science to give me answers helped tremendously. By the time I had expunged all religious beliefs I realized the jump wasn't even that big. The hardest part was just making the decision to do it.

By opening the eye.

I never had this struggle, I think the issue could be perspective. I guess one could see the universe as random and meaningless but that doesn't necessarily mean it's a bad thing, it's just a thing, to me anyway. If you want to feel meaningful maybe Perdue your own goals? Develop meaningful relationships with friends or family? Remember the world is random, I suggest to try to experience as much as it has to offer.

I find it is simply the innate ability to face reality.
Pragmatism is a great help in dispelling delusions.

The "reality of a cold, cruel, random existence" is only one way of looking at
life. It doesn't have to be viewed from that perspective. Additionally, that was already the way life is.
You're alive. Find your life's own meaning.
Now that you've embraced living your life with reason over delusion, go from there.

It just adds to the mystery and majesty of the universe.