I wish to change the iCloud on my phone

Sign out the Apple ID from iPhone see the article Sign out of iCloud on your iPhone, iPad, iPod touch, Apple TV, or Mac - Apple Support

And sign in with new Apple ID already created Sign in with your Apple ID - Apple Support

Hi Fer1960,

Thank you for reaching out to Apple Support,

If you wish to change your iCloud account, follow these steps:

1. Sign out of the Apple ID from your iPhone: Sign out of iCloud on your iPhone, iPad, iPod touch, Apple TV, or Mac - Apple Support
2. Then sign in with your new Apple ID: Sign in with your Apple ID - Apple Support

Best Luck,

R