How do I sign in when I can’t in FaceTime and Messages?

Hi OmranAlhout989

Welcome to the Apple Community.

Your Apple ID is the account you use to access Apple services,

like the App Store, Apple Music, iCloud, iMessage, FaceTime, and more.

It includes the email address and password you use to sign in,

as well as the contact, payment, and security details you use across Apple services.

How to create your Apple ID if you do not have one::

https://support.apple.com/en-au/HT204316

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Apple Support articles to help you get familiar with FaceTime:

If you can’t turn on or sign in to iMessage or FaceTime

https://support.apple.com/en-us/HT201422

Use FaceTime with your iPhone, iPad, or iPod touch

https://support.apple.com/en-us/HT204380

Make and receive FaceTime calls on iPad

https://support.apple.com/en-au/guide/ipad/ipad6b71e29e/ipados

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Apple Support articles to help you get familiar with Messages:

Use Messages on your iPhone, iPad, or iPod touch

https://support.apple.com/en-us/HT201287

Use Messages to receive and share content with friends on iPad

https://support.apple.com/en-au/guide/ipad/ipad5bf3d77b/ipados

What is the difference between iMessage and SMS/MMS?

(Learn why some of your message bubbles are blue or green)

https://support.apple.com/en-us/HT207006

Hope this helps you :-)