I've advanced quite a bit, and now I'm unsure of where to go

I'm cleared Dungeon, Lair, Orc and Slime so far, here is my morgue too : https://pastebin.com/pmD8KN4A

Should I attempt the snake level ? Swamp ? Or Depths ?

Also is my build alright ?

Update : Finished Snake, obtained a Tower Shield +8 of ponderousness, may equip it if needed

Were the new shapeshifter backgrounds removed from trunk? Someone made a post about the a week or so ago but I don't see them on trunk.

Edit: Damn this community is fast to respond

This is still my OpMo of Jiyva, it's a Sword/Shield using Op, and I forbid myself from using Shape shift (because I want to see if I can with no shapeshift on an Dextopode)

I think he is now pretty strong, but I dunno if he's ready for Vault/Elven Halls.

Should I just clear Depths then Zot ?

Could I eventually attempt Hell or Abyss ?

Character file : https://pastebin.com/QB7WaseP

I am running DCSS on a Linux Mint Laptop and installed it via the software manager. Every time I start DCSS, it opens in full window mode on my laptop screen. I have an external monitor and would like to move the window to the other screen but can't seem to un-maximize the window.

I'm sure it's an easy thing, but I have searched and not found an answer. Maybe it's an OS issue?