A Short Story Prequel to Avoid Infodumping

Currently, I'm trying to write a series that has an extremely complex backstory, mythology, history, culture, etc. I really don't want to infodump this information into my story and lower the enjoyability of my work. At the same time, I don't want to confuse my readers. I had an idea for a short story prequel, however. It would involve a person from Earth coming to the setting in my book. This would be a great way to introduce the setting without having to infodump, but I'm not sure that this is a good idea. Should I write it, or is there a better solution to my conundrum.

I like this idea and I'm a little pissed I didn't think of it. My shits pretty beat though so I can get away with just insinuating the backstory.

however you might want to place it in the beggining of the main story to avoid an infodumping prequel

Can you guarantee that a reader will see the prequel? If a reader misses the prequel, will the rest make sense? Does the prequel make sense on its own?

I know it's a little boring, but have you tried outlining the story? That way you could work in which details/information you want to work into the story at certain points without having to worry about infodumping all in one section or bothering with a prequel.

Just make a character who's lived in a cave for his/her life that needs everything explained to him/her in the main story. Then, have the info get *righteously dumped* in bite size pieces.

By righteously dumped, I mean there is a real reason for the characters to describe and explain something.

have someone tell stories to children. that's a good infodump method