Before we begin, this is NOT a tutorial provided by Adobe themselves, quite frankly there is a little bit of a workaround both for you and where you are getting the presets. I would say the safest, easiest way to install Lightroom CC presets and to fully enjoy the experience would be:
- to install your presets through Lightroom CC on Desktop and make sure it synced with Lightroom CC on iOS and Google Play.
- know that not everyone is following this practice (with their files) so make sure before you buy and/or ask the seller
On the other hand, Adobe has a lot of great Lightroom CC tutorials from beginner to experienced. Definitely worth checking out.