You were throw in one of the JoJo's Bizarre Adventure universes at your choice, you can do whatever you want, you can get yourself a Stand, you can get Hamon, you can get Spin, you can turn into a vampire, the choice is yours. Join the Joestar family in their adventure to defeat the many evils like DIO, Kira Yoshikage, Funny Valentine and many other. Or instead join the villains in their journey to kill the Joestar family, or do any other thing, it only depends on where your adventure leads you.