I introduced myself; I showed up; I volunteered
Como vienes los martes, me presenté.
Since you come on Tuesdays, I introduced myself.
— Un simple accidente (2025)
Me presenté voluntario para hacerlo, pero no quisieron mi ayuda.
I volunteered to do it, but they didn't want my help.
I showed up at the meeting.
Así que me presenté y le pregunté por qué quería verme.
So I showed up and asked him why he wanted to see me.
— Caché (Escondido) (2005)