Yeah, modding sucks right now. If the game let’s you manually add mods without injecting, then it’s fine, though manual can take a while. Nexus Mod Manager (and most others, though CKAN for KSP(1&2) works pretty well but won’t launch the game through that application for me) don’t work yet for Linux, but it looks like they’re working on a new application that’ll run natively on Linux, so I’m looking forward to that.