how to access the app store, my app says can't connect, try again. Still won't connect.

Read the suggestions in these support documents:

Resolve issues between iTunes and third-party security software - https://support.apple.com/HT201413 - You can’t connect to iTunes Store to buy or download content.

"If you can't connect to the App Store, iTunes Store, or Apple Books" click here --> https://support.apple.com/HT201400

- If none of the suggestions work, try the last one: "If you’ve tried all of the above steps and you still can’t connect, contact Apple Support."