Having some pre-made adventures makes the life of a DM easy. Just open the book and go. You can have some amazing fun with your party with minimal prep. And there's three new, connnected adventures up on Kickstarter that will take your party from 1st to 5th level. You can check out Monstrous Antagonism now.
From the campaign:
A three-part 5E adventure made for the epic and legendary! Defend existence itself and fight back against a new threat, the Tertholder, who seeks nothing more than the spoils of war and the domination of every dimension! The adventure is designed for levels one to five.
Discover new creatures from a different dimension and strange magic centered around the cross-dimensional abilities! We want to create a collection of enemies unique to the adventure, giving you new and exciting enemies to throw at your party!
The Traveler: A creature that thrives on the life force of others, it travels between dimensions, laying its children and turning the surrounding population into mindless pawns. The Tertholders discovered cross-dimensional magic from studying these creatures in their world.
Dark Festering: A ravenous hive of small winged insectoids that travel only in the dark, devouring any organic material in mere moments.
Tertholder Portal: Developed and perfected by the Tertholder mages, you can travel to alternate worlds, discover a place that exists alongside your own, this magic is only as powerful as the user and can be highly dangerous and unpredictable.
The campaign's 1/5 of the way to its goal with 31 days left to go.