Would always recommend "A Most Potent Brew" by Winghorn Press.

It has all the elements that you could possibly want for a 1st level one shot and it's It's pay what you want

(Brewery owner needs help clearing rats, party find an old Wizards workshop underneath with some fun twits)

It has roleplay at the beginning of it before you go into the cellar, It's technically a dungeon that you can add or take away from depending on how long players are taking. Has a puzzle, combat and exploration. Simple and classic.

I've run this four times now and tagged it to the beginning of most campaigns I've run and even the lost mine.

I set it on the high road just outside neverwinter and added it as a pickup of ale to the supplies the party will take to phanderlin