So if you're used to modding by moving files around and editing a text file, you're right at home. Same process. Maybe some Linux quirks like running the game with some command lines flags.
If you're used to modding by clicking a few buttons on a mod manager, nah. We aren't there yet.
The Deck is just a handheld Linux computer. You'll have to install mods manually, as Nexus doesn't have a Linux application yet (it's coming, slowly), but it shouldn't be too hard. You'll have to exit Big Picture Mode and then you'll be on the Linux desktop and can do all the things a Linux computer can.
There should be somewhere that tells you how to install mods manually. It's probably a folder somewhere that you just extract the files into.
There you go, thats the issue. Either mods work great through steamworkshop, or you pray that they've created an easy installer.
I'm all for manually adding mods, been doing it since 2012. However, I got a steam deck explicitly so I'd never need a keyboard and mouse again. So far, I haven't needed either.
When London came out, it required 23+ steps with a lot of terminal commands, fuck all that is all I'm saying.
I don't have a deck but I do have a laptop with very similar specs and it has severe issues with performance. It isn't much better on my partner's GTX 1080 either.
Too long can't watch, are the stability issues and major bugs all cleared? at least to the level of general stability that Fallout 4 offers? I'd be interested in giving this project another go, but had a real rough time on launch.