That Linux users want to be different to the rest of the world isn’t a counterpoint.

This is one of those “if you have to ask, it isn’t for you” type things. If you’re confused, go for the SD card, the difference is negligible.

Just play some games. All the bollocks people mess about with makes almost no difference outside a few edge cases, and we don’t even know if the OLED will benefit from them still given its better cooling and memory bandwidth.

The only Steam Deck specific thing worth suggesting is playing Aperture Desk Job first because it’s free, basically exists to check everything is working and show you what it can do.