postmarketOS

Hey so I'm VERY new to the open source/linux thing, and although there are resources online they are still kinda hard to understand to a google kid such as me, or hard to find for someone not experienced.

It appears I can run postmarket on my galaxy A5 that was lying around in a drawer for 10 years. Thing belonged to my deceased grandmother, still work fine, has no scratch, I just never used it because I already had a device. Wanted to use it as a basis for a cyberdeck using only electronix stuff lying around.

Followed the wiki : I can enter flash mode, downloaded the twrp app but then I struggle to understand what to do. When I select flash to "select device" it just says "failed to fetch data from server". I also downloaded a twrp-3.7.0-9-0-a5xelte.img.tar but can't figure what to do with it.

Any idea gang ?

tysm