There are different kinds of desires. So, you are right about certain kinds of desires. You are inaccurate when talking about the other kinds of desires that are actually beliefs. Yes, you're right that you can suppress desires that you may or may not be CONVINCED of. You can choose to desire something that is repulsive. Well, maybe not subjectively repulsive to the person. It can be hard to stop bad habits, addictions, lifestyles, those desires that interfere with what you believe. So, you ask Christ to help you. Also, you tell other people and get help. It is possible to change the course of your life, the ship that you are piloting. You can turn that boat around.
RE: You do not "choose" your beliefs. You are (EITHER) CONVINCED (OR) UNCONVINCED.