I prefer LTspice but I do use Kicad’s NGspice (and prefer running LTspice from Kicad - see my info in this recent post).
That said, here’s my NPN (BCE). Be sure to have a good schematic, spice-models and commands. And, some homework on using the Simulator in Kicad…
Others with dedicated NGspice knowledge will chime-in, perhaps…
My NPN running in Kicad (not in LTspice, but, I can make it run in LTspice, too! And, run the schematic with either Spice or pSpice symbols/models…)
