You are correct sir!Just a friendly note here:
Unless your character is a "self-proclaimed" 'Darth,' you probably won't be allowed to start out with the title. According to the Sith Brotherhood write-up, the 'Darths' (Sith Lords) are limited to five Sith who have ascended through the ranks.
You might check with the faction leader, @Relent, for further guidance. Cheers!