Which version is correct?

I’m trying to be a Christian but I don’t know where to go. From my understanding Christianity can be divided into 4 major groups: Eastern Orthodox, Catholicism, Protestantism and Other.

I’m not interested in the hundreds of tiny sects that could all be lumped into Other.

What is the real Christianity that Jesus taught and God wants us to worship him with? I don’t want to go to a Catholic church only to die and find out on my way to hell that Eastern Orthodox is the true way all along.

Also, what beliefs separate Eastern Orthodox from Catholicism from Protestantism?