Don't use whatsapp so idk how they work as far as settings and backup go, but most other things can be backed up to Google Drive/Photos if you are okay with using Google. Once you have your iphone just download Gdrive and Gphotos to retrieve your data. Not sure if your contacts would transfer but you can always manually add it to your iphone before resetting your android.

Whether or not it's worth the transition is up to you, you decide what's worth.