Here's how you can follow one or more Categories to get more personalised recommendations:
Navigate to the Explore screen.
Tap on the Category you are interested in.
Tap on "Follow".
Once you've followed at least one Category, a Blink "Selected just for you" and based on your selections will appear everyday in the For You screen of the app.
To unfollow a Category you're not interested in anymore, just do the following:
From the Explore screen, tap on the Category you wish to unfollow.
Tap on "Following".
Tap on "Unfollow".