Electrum is the best. Since you can't master a PC well, you can use the suggestion of using the bluewallet wallet that people mentioned here because it's the best option.
Bluewallet is available on IOS and Android. Bluewallet only supports BTC does not support other asset options. Bluewallet can also connect to Electrum servers if you want to at some point.

In my opinion, the weakness of the bluewallet wallet is that it is not a wallet for storing large amounts of assets in the long term.
If OP wants to use a wallet for long-term storage of large amounts of assets, choose an open source hardware wallet.

Considering that recently there are many choices of open source Bitcoin wallets available, also pay attention to the authenticity behind the mask they display.