As someone who's used a lot of both iOS (iPhone Operating System) and Android: It's hard to say that iOS is easier. They're about the same, if you ask me. I think what's really easier is for you and your wife to use the same kind of phone, so you're better able to help each-other out.
Unfortunately, the Android on one Android phone can be quite different from the Android on another! So, even if you both have Android phones: It might still be hard to help each-other unless it's the same brand of Android phone, or better yet, the same model. It depends on how much the brand/manufacturer has messed with Android: With minimal messing, two different brands will give you the same Android experience.
If you and/or your wife go with Samsung: Avoid Samsung alternatives to the included Google apps (for example, use Google Chrome instead of Samsung Internet)! Those Samsung apps are not even available on non-Samsung Android phones, so reliening on those just makes it harder for you to help other Android users, and for other Android users to help you.