If you do not know what evolution is, then you won't be able to find evidence of it. The same thing happens when you don't know what a tree is. If you do not know, then you won't find any trees in nature.
Even if you can find a tree, you cannot see a tree grow, because it happens so slowly that even if you stare at it nonstop for several days, you won't see the tree grow. Similarly, evolution does not happen overnight. Therefore you cannot see evolution even if you are staring at something living. Besides, evolution does not happen the same way that a tree grows. A tree may grow continuously, year after year but evolution may happen suddenly for a short time, because of environmental changes, but if the environment does not change, then a species may not evolve or change for millions of years or longer. Even when a species evolves rapidly to a new one, it takes more than a single generation, and no one can predict which species will give rise to a new one. Therefore even if you live millions of years, you would not know where to look and where to look and you may wind up not seeing any evolutionary changes.
Nevertheless even though we cannot see a tree grow, we can cut it up and see evidence of growth in the tree rings. Similarly, if we look at the fossil record, we see evidence of evolution. we see evidence for example, of humans evolving because as we look in older and older layers of rocks, we see fossils that look less and less like humans and more and more like an ape. For example, Homo erectus is our ancestor and it is very similar to us. It lived from about 1.8 million years ago to about 50,000 years ago. If we look in older layers of rocks we see australopithecines They are still identifiable as being very similar to humans but their skulls look a lot more like those of apes than those of humans. The fossil record therefore tells us that humans evolved from an ape.