It can depend on the bass you have and the bass player who you want to emulate. For example, if you play a Hofner and play a lot of Beatles songs, you would use a pick like Paul McC.
I personaly started with fingers, THEN went to pick. It also helps to learn to slap fluently too. But what really matters is the genre of music you want to play, like look at some players you admire and use them as a role model of how you want to play, overtime you'll get your own sense of style and sound though.
