It's natural to want to make a good impression on someone you care about, but it's important to remember that true love and acceptance means accepting someone for who they are, flaws and all. Changing who you are to try to win someone's affections is not a sustainable or healthy approach. It's important to be true to yourself and not compromise your own values or beliefs in order to please someone else.
It's also important to remember that you cannot control someone else's feelings or actions, and even if you change yourself, there is no guarantee that the person will have feelings for you. It's better to be yourself and let the person get to know the real you, that way if they do develop feelings for you, they will be for the person you truly are.
It's always good to improve yourself and be the best version of yourself, but it should be for your own well-being and not to please someone else. It's also important to communicate with the person and understand their perspective and feelings, which will also help to build a stronger and more meaningful connection.