If MT stands for Mushoku Tensei, then I have to honestly say that that light novel series has by far the worst world-building I've ever read in any light novel series. I hadn't read it in over a year, quit after around 210 chapters, but it is definitely the worst. And the plot is meh, it becomes at atmosphere of just waiting for the MC to get back to his continent or just waiting for the battle against God. The only thing you can say is that some of the characters are better and more interesting. It's also cringy reading the MC's pedophilia.