Arman the Parman, has great resources and guides.

See the 8 levels of storage security.

https://armantheparman.com/zerotrust/

Here the guide to the different wallets:

https://armantheparman.com/hwws/

I would give them these guides along with your present. You will see that is not recommended to skip steps as it can frustrate newbies.

To use with an iPhone I think is going to have to be Ledger with Bluetooth connection but it has some concerns as you will be able to read in the guide.