Here are some ideas

https://www.hometalk.com/search/posts?filter=bed%20frame

Do you already have a headboard that you want to cover. I ask because the headboard will need to have access wood to accommodate the frame because you are building outside the base.

Hope this helps you:

https://www.familyhandyman.com/list/10-awesome-diy-platform-bed-designs/

Here's some comprehensive instructions

https://www.hometalk.com/40947273/customize-your-room-by-building-your-own-bed-frame

Customize Your Room By Building Your Own Bed Frame

I think your best bet would be to build it like a box to go around the base rather than trying to attach it to anything. You could build the headboard and attach to the wall. Then footboard & sides in a "U" shape to slide into place against the wall.

Here is a https://www.google.com/search?client=firefox-b-1-d&q=how+to+build+a+bed+frame

Here is a video for a quick solution: https://www.youtube.com/watch?v=5b-BIZMCOIY

this is the bed frame that we built https://www.charlestoncrafted.com/how-to-build-a-platform-bed-for-50/

Hello. I always look to Ana white for most of my building plans. Here is her bed building gallery -perhaps you can find something you might like to reproduce there.

https://www.ana-white.com/woodworking-projects/categories/beds-and-bed-frames

If you do not already have all the requisite carpentry tools to construct a bed frame, then purchasing a preowned one may be more cost effective.

Hi Kathleen, hope this helps you out,

https://www.youtube.com/watch?v=5b-BIZMCOIY

Hello Kathleen,

Apply, Plywood or MDF to each side and base of bed frame you have and upholster them.