Maybe the problem is with the English language. Consider:
- I believe that Tolkien created orcs as characters in Lord of the Rings.
- I believe that orcs exist.
- I believe that orcs are ugly.
- I believe that orcs should be killed whenever we encounter them.
So no, I don't "believe in" evolution. Nor do I "believe in" trees, or rocks, or raccoons, all of which exist in the world independent of my "belief in" them. I take biological evolution to be a fact of nature, without which the history of life on Earth is incomprehensible.