I can’t reset my password because I have a new cell number and my account has my old number

On any of your Apple devices can you access Settings… Your name… Password and Security to edit/add your new phone number?

If not, while their online support article says for forgotten password, account recovery steps are also for a new phone number if you can’t sign in to update the number. https://support.apple.com/en-us/HT204921

When going thru the account recovery steps you’ll need to first enter in that old number to show you know it. Then when you get to the step where it says it sent a code to that old number select the option most like “didn’t get code” and it will let you continue with your current number.

Also keep in mind Account recovery is a two phase process once started. Phase 1 is the evaluation period, usually 24-48 hours but can be longer or shorter. This phase says Apple is evaluating your info and you’ll get an update after the posted time is over (people mistakenly think it means they’ll be able to reset the password immediately after this first phase.)

Once phase 1 is done it enters phase 2 where https://iforgot.apple.com/ will give you the final amount of days (can be weeks) you’ll wait. On that final day you’ll get a text, follow that text/email immediately.