Depends, obviously. The point of the One Shots is that it's a fairly short adventure, with a bigger-than-average chance of finishing. I'm currently DM-ing one, which is almost completed. I'm sure a new one will start soon, or you could start your own.
Personally I took an old Dungeon adventure and ran it for 5E, and I know EarlyBird did likewise, but there's nothing stopping you from coming up with your own adventure.
Or just skip the One Shots and start/join a larger game. Whatever you prefer.
If you would start DM-ing a game, I might be interested.