you can get iOS style badge alerts with the paid app Nova Launcher Prime and Missed It! plugins. it's pretty easy to set up, you install the launcher as you wound any other app, and then hit the same 'home' button as in iOS, and it asks you which launcher you want default. you choose Nova Prime and hit 'always'. then you launch the other app Missed It! and add in any apps that you want notification badges with. then in Prime's settings you enable unread counts, enable accessibility, and that's it.
for books, i recommend Play Books as the best alternative to iBooks. Play Music in place of iTunes. Play Music has a unlimited access deal vs. iTunes' per-song price, which means you can literally save any number of songs available on your device or in the cloud with one low monthly fee. Google has done a similar ecosystem as iOS in their newer setup, which you might find useful. keep in mind that iBooks will not transfer to Play Books, and you might have to repurchase them and find out which page you're on by getting that info from your iPhone and simply turning to that page in Play Books. it seems a bit of a shaky start but worth it in the end. i myself came from a lifestyle around Apple products.
the one thing you might have to get used to is a status bar clogged with icons, unlike your iPhone's more sterile bar with notifications needing to be pulled down to view. the other thing is the lack of banners on your lock screen when a message or such comes in. you will need to pull down the notification bar in Android to view details on them and swipe them away to dismiss. personally, i still think iOS is superior in that regard.