Get Familiar with iOS 10.3.3
One of the first things you'll want to do is get familiar with iOS 10.3.3 beta and it's changes. This way, you'll know exactly what you'll be getting into.
As of right now, the iOS 10.3.3 is a tiny update. The first beta brings little more than under-the-hood improvements for iPhone, iPad and iPod touch.
It does come with some new iPad Pro wallpapers but you don't need to install the iOS 10.3.3 beta to get access to them.
Apple could add new features into future iOS 10.3.3 beta releases but we wouldn't count on it coming with any game-changing apps or services.
iOS 10.3.3 will almost certainly be focused on bug fixes and security patches. If that doesn't sound interesting to you, skip the iOS 10.3.3 beta.