I need to erase some apps , it’s taken all my storage up. How do I do this?

If you don’t see a Delete option when you hold your finger on the app and you are using Screen Time, go to Settings/Screen Time/Content & Privacy Restrictions/iTunes & App Store Purchases - Change Deleting Apps to Allow.

Then go back and try deleting the app again.

And remember to cancel any subscriptions associated with an app you delete. Just deleting the app does not cancel the subscription.