To change your YouTube handle, you need to modify your YouTube channel name. Here's how you can do it:
Sign in to your YouTube account: Go to YouTube's website and sign in with the Google account associated with your channel.
Access your YouTube Studio: Click on your profile picture at the top-right corner of the page, and then click on "YouTube Studio" from the drop-down menu.
Go to Customization settings: In YouTube Studio, locate the menu on the left side of the screen and click on "Customization." This will take you to the channel customization settings.
Edit your channel name: In the customization settings, click on the "Basic info" tab. You should see the current name of your channel listed there. Click on the pencil icon next to the name to edit it.
Enter a new channel name: A dialog box will appear where you can enter a new name for your channel. Type in the desired name for your YouTube handle.
Save your changes: After entering the new name, click on the "Publish" or "Save" button to save the changes. YouTube may prompt you to confirm the name change before finalizing it.