An artist's palette is a very personal choice. A specific pigment that is essential for one artist will be nice to have for another, and avoided at all costs by a third. Overall palette is the same, so, instead of picking specific colors, decide what will be painted. Landscapes, seascapes, portraits, still lives, etc, each have their own range of colors.
Better, maybe, to decide on what to paint and then choose six basic colors for that palette - one cool and one warm of each of the primary colors. Maybe a white, but even that isn't necessary, and no black - mixing one's own black opens up so many doors.