No, it's not a dumb question.
Since you're playing as a Hashashin, the class is already at his ascended form. So you want to collect "Ascension/Awakening Skill Book".
You can get them from AFK grinding (easiest), quests, and events.
You can even go to maps with increased skill book drops. Usually it'll take you a week or two (or even a month - depending on where you farm) to get those skills to level 3s. (Always be sure to use your Hasashin for farming though :)