For desktop, I’ve liked Lato, Source Sans Pro, and Inter to name three.

For terminal, I used Iosevka’s customizer to create a gorgeous Fira Mono-like variant that I call Iosevka Firesque:

[buildPlans.IosevkaFiresque]
family = "Iosevka Firesque"
spacing = "term"
serifs = "sans"
noCvSs = true
exportGlyphNames = false

  [buildPlans.IosevkaFiresque.variants]
  inherits = "ss05"

    [buildPlans.IosevkaFiresque.variants.design]
    capital-g = "toothless-corner-serifless-hooked"
    capital-q = "crossing-baseline"
    g = "single-storey-serifed"
    long-s = "bent-hook-tailed"
    cyrl-a = "single-storey-earless-corner-serifed"
    cyrl-ve = "standard-interrupted-serifless"
    cyrl-capital-ze = "unilateral-serifed"
    cyrl-ze = "unilateral-serifed"
    cyrl-capital-en = "top-left-bottom-right-serifed"
    cyrl-en = "top-left-bottom-right-serifed"
    cyrl-capital-er = "open-serifless"
    cyrl-er = "earless-corner-serifless"
    cyrl-capital-u = "cursive-flat-hook-serifless"
    cyrl-u = "curly-motion-serifed"
    cyrl-capital-e = "unilateral-bottom-serifed"
    cyrl-e = "unilateral-bottom-serifed"
    brace = "straight"
    ampersand = "upper-open"
    at = "threefold"
    cent = "open"

Takes one to know one.

- fellow nerd

Fwiw, you can change the shortcuts for nano in your ~/.nanorc. Most of mine are the same as standard desktop editors, except undo is Ctrl+U because Ctrl+Z is commonly bound to suspend, and quit is Alt+Q instead of Ctrl+Q because in browser window terminals (e.g. Unraid) Ctrl+Q usually closes the whole browser (oof).