Is it possible to completely erase my internet footprint on my tiktok account?

So I decided I want to revamp my entire tiktok account. I want to start making content on it but I'm wondering will people be able to know my username from before?

Are people gonna be able to know my previous username history? How can I ensure they don't know? Is it possible someone can see my comment history? I'm in the process of deleting all my comments but I'm afraid there might be some type of backlogging that someone will do to try to find all of my comments.

If it's possible to completely revamp my entire account so no one knows what it was like before please tell me guys.