I need a new Apple ID to use my iphone 7

Why not just sign in with the old one? That way you can continue to use everything you ever did with the old one.

Read this support article to learn how to sign in with your Apple ID on various kinds of devices --> Sign in with your Apple ID - Apple Support

For an Apple Mobile device:

1. Open the Settings app.

2. Tap Sign in to your [device].

3. Enter your Apple ID and password.

4. If prompted, enter the six-digit verification code sent to your trusted device or phone number and complete sign in.

If you really need to make one in addition to the one you are using to post here, this article explains how to create a new Apple ID (create an Apple Account) --> How to create a new Apple ID - Apple Support