There's Osmium where you can find fits.
You can also combine searches on zkillboard to find fits..
eg: all Moa losses from Pandemic Legion
Orthrus, Gilas and Phantasms are great but expensive ships, so depending where you fly them many opponents will (try to) primary you.
I'd highly suggest to learn the basics of T1 cruisers (move on to Navy cruisers after) and watch videos before jumping into combat with pirate cruisers..
eg: when flying the Orthrus, you need to know how to kite properly (start with a fast and cheap Caracal, followed by the Scythe Fleet issue)