Evenglare
Adventurer
Couple of ways of dealing with this stuff. First the sage background has a power that lets you know where to research crap you dont know. Second, look under basic document page 59, using each ability. Third, if this skill system bothers you don't even go near 13th age. I think 5e skill system offers a nice balance of skills and that awful bloated skill system of pathfinder and 3.x. Especially 3.x with those skill points god kill me now. Needlessly complicated IMO.