You don’t need to pretend to be extroverted to get the attention of women on dating sites. You stand the best chance of getting the best matches if you are yourself.
All you need to do is make a good dating profile that showcases your personality and interests, along with good photos. That is really it. People sometimes try to make online dating more complicated than it needs to be.
The advantage of online dating is that it exposes you to matches that you would otherwise never meet in your everyday life.
There are women on dating sites who like introverted guys. You just need to focus on making the best dating profile you can and you will get matches.