Make the next campaign your own
Keep the useful structure and change the setting: a dark beacon becomes a missing caravan, a sealed gate, or a damaged station transmitter. Give the party someone to care about, three places worth visiting, people with understandable motives, and more than one workable ending.
You are ready to prepare your own small campaign when you can create a world, put a correctly sized map into a scene, place and assign a character, keep notes private, bring a player to the table, recover a stale view, and turn the group's choices into next session's preparation.
For recording later, use video scripts. It turns these same steps into short screen-only lessons with narration and caption copy. You do not need to record your face or your own voice.