you seem to have figured out the basics already :> but i have a guide for it if it's any help https://keeri.place/workshop/flex-layouts.html
spent way too much time on this today but im finally figuring it out slowly but surely hehehehehehe my new design will be legendary
ok yeah so basically had to download and delete and then reupload my whole site in order to reorganize the file system but appaz that screws w the past updates srryyyy oh well new site is gonna be amazing