Hiremfin,
Re: can't access apple id info on phone
See if this Apple Support article (link below) helps:
Sign in with your Apple ID - Apple Support
Eg: says:
- Open the Settings app.
- Tap Sign in to your [device].
- Enter your Apple ID and password.
- If prompted, enter the six-digit verification code sent to your trusted device or phone number and complete sign in.
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Re: I am not able to install or update apps.
You may need a payment method in your Apple ID account for the first time you use the App Store or iTunes.
(This is required even if you only download free apps.)
How to: Change, add or remove Apple ID payment methods – Apple Support
And
If you can’t download or update apps on your iPhone or iPad – Apple Support
All the best :-)