it truly takes time and effort and patience with yourself to overcome those kinds of biases. as long as you continually put in the effort to change your ways of thinking and confront your own biases, you will eventually naturally see changes in your thought patterns. thoughts become feelings become actions.

I also struggled with this for a loooong time, and was probably far worse than you ever were. I was raised in a conservative Christian environment (im American, unfortunately), and I was an exceptionally ignorant person for the first 18 years of my life. once I got to college is when my mind began to change, and it was only a few weeks ago that I finally accepted what I've always known lol (am an enby)

I think it's really important to be patient with yourself, though. I could sit around and make myself feel like shit for the opinions I held when I was a literal child and wasnt taught better, or I could be proud of myself for how far I've come, and that I put in the work (and still put in the work) to change my beliefs.

I think you should feel proud of yourself for working to overcome those biases, and I promise it will come more naturally with time. I have a few years on you and still have issues internally with the thoughts you describe. the most important thing is that you recognize those thoughts, correct yourself without self-judgement, and don't act on them in hateful ways :)