Like some others I didn't try to build another belief system. I did go to college and was exposed to other ways of thinking, but this is not what was pivotal for me.
The big thing for me was the simple realization that beliefs, like any other thoughts are not the real thing, they only refer to things which are real, at best. Thoughts are just thoughts, nothing more. Therefore, if you want to know what's true, it is not a matter of changing your mind in any way, you have to realize that your own mind is just your own mind, your own view of the world was never the real thing anyway. Most people tend to get caught up in their own way of thinking, but of course the simple fact of the matter is there is a great big world out there that is as it is whether your idea of the world is relatively close or way off base about it. Even if you have a pretty accurate view of the world, if you don't recognize this fact you'll be mistaken in the final analysis.
See, even the belief about God falls into the same category. That's not to say there is no God, just like a distorted world view doesn't necessarily mean there is no world, but the first step is just to see it's all been just a bunch of thoughts. Thoughts, especially beliefs, are more likely to distort your view of reality than clarify it. So I guess I am just saying in my way what Farkel and maybe others have said about detoxing, clearing out your mind so you can just see clearly. The question is, do you want to know what's true or do you want something to believe in?
So to me, it makes no sense whatsoever to build another belief system. My thinking about things will naturally change according to life experience, but I take none of it seriously and don't cling to one piece like "this is IT!" To actually build another belief system is just to build another illusion, another house of cards. It may be a better one in terms of being not nearly as dysfunctional as the WTS, but illusion is illusion. Some people are not ready to live this way, and that's fine - I make no judgements. But I think this is useful to mention and something one might just keep in the back of their mind even if you do go searching for more beliefs.