Best of all login into cf discord and ask many little questions about how to pk and prepare for pk, such as "What to do if it or that happens?".

Also keep in mind that best builds for a strong players are very different from the best builds for a more newbie players. For example a newbie will never make an elf stsf dagger spec shine, while many more experienced players can do it with easy.

I'd suggest to begin with very easy class - like human assassin and very easy cabal - like Fortress. Don't hurry anywhere, level sit at level 25 before you kill a dozen or two enemies. Ask your cabalmates for help, such as where to get this or that, what to do in different situations and so on. And most important - socialize and make as many ic friends as possible. It's the fastest way to learn all preps etc.