Hey, you only gave me one hour to reply! I went to sleep after I posted and I'm sorry, but I am busy and will not necessarily always have the time to respond right away.

If you don't want to give your name and personal ID, I recommend that you still have a website and social media around your pen name. Make sure you are focused and your style is consistent and recognizable. Create some professional images (or commission some) that don't reveal who you are, but can be used to create a consistent look across different platforms. Contact potential employers as an anonymous freelancer and get testimonials that you can at least show to other employers.