Not sure what your exact requirements are, but these three should work great as simple upload and share embed link type servers :0
Lychee: My personal choice even for my entire photo library since I just like things to be simple
Pellicola: Self discribed as “Pastebin for your photos”
Media Goblin: Lets you view more then just photos, might replace my lychee for non-photography use






If your truely going the endevour route, here some tips on recoving from a broken state:
The archwiki is your friend, read the relevant pages before asking on forums
Install arch manually (no archinstall) and thoroughly read the wiki to understand how your system is put together. Then install endevour, just from doing a manual arch install you should have the knowlage to fix like 90% of issues
Learn the basics of systemD, will also help you on 99% of mainstream distros
Keep your /home directory on a seperate partition, useful for doing a system rescue and for distrohopping