Does believing in evolution mean that you cant believe in creation?
Many people believe something one day and change their mind another. Others feel they must believe, because that is what they have been told. Then we have absolute certainty that does not move.
Now the Bible says that it is by trust(faith) that we* understand that the worlds were framed by the word of Elohim.
That takes care of the creation question, because without trust, your thoughts are subject to change.
Having created the heavens and the earth does the Eternal Almighty "need" evolution to function? The answer is categorically no. Paul reminds us* "according to the purpose of him who worketh all things after the counsel of his own will:"
While at Athens Paul used this, "In who we live and stir and be". That word "stir, set me on a 4 year study of quantum mechanics along with a parallel study on cosmology. For the Almighty to control the big things then, by default, He must be in complete control of the subatomic.
In summary there is no need for evolution.
we* us* The redeemed, regenerate and repentant sinners.