Ooooo, take a look at these and see if you can make any of these, plans are included:
Paulette: maybe this will help --
Here is a cool tutorial:
Several good ideas here:
Here's a post that might help - https://www.youtube.com/watch?v=5b-BIZMCOIY
You could use 1 by 6’s for the sides then you need a small ledge for the mattress to rest on then drop a piece of plywood on it and lay the mattress on the plywood
How do you make a regular bed frame into a platform?
I’ve seen a slew of great ideas on Hometalk. Did you try the search bar at the top left?
the simplest I've seen is to use either a large pallet or cinderblocks to prop the box spring up on.
You can use pallets if you want to go very basic. https://youtu.be/3tQRwdP6gnQ
Here is our tutorial! https://www.charlestoncrafted.com/how-to-build-a-platform-bed-for-50/