Since you're just starting out I recommend learning on a long-scale. As a '70's punk veteran I had no instruction and self-taught on a very used Fender Musicmaster. When I could afford the bass I wanted, a Rick 4001, the transition was difficult and it took me a while to get my speed back to normal with the longer neck and fret spacing.
Everything said here about P basses is true, and probably the bass of choice for punk. Punk icons like Paul Simonon (The Clash) and others migrated from Ricks to Precisions for playability, simplicity, and sitting well in a mix, especially in a power trio (guitar, drums, bass.) Not knowing how large your hands are, you may want to consider a P with a J-width neck (many P/Js are configured that way) or the Player neck which is probably the easiest to play of the current non-US Fender P-width necks. If you can find a used American Special P that would be the ultimate. It has a slim-C countour and carbon-fiber stability rods, and is the nicest playing Fender P neck I've owned. They come up in the classifieds here every once in a while. The necks also come up in the classifieds, and you can swap out most Fender P necks.