I accidentally used my personal name as my new YouTube username and would rather use a separate creator name. Can I change it without losing my existing content?
Yeah, it is possible to change your YouTube name without losing your existing content. Go to YouTube Studio, click on Customization and then Profile. Update your channel name.
Hey! Make sure to change your channel name and handle together so your branding stays consistent. Also, pick a creator name you’ll be happy with long-term, since changing it repeatedly can confuse viewers.
If you want a creator identity that's totally separate from your personal Google account, look into a Brand Account. It lets you add managers and keep the two separate.