BUT, I can hope, somehow, to see it appear from the use of my rangers skills, right? Tell me there's some logic in the choice of the skills drivin to that.
See Help Ranger, or Help <guild> for a better idea on what skills you might acquire OVER TIME.
But if you're a ranger, yes, there tends to be a logic for branching. To a point.
For a totally unrelated example: If you want to get better at overhearing conversations (listen), you'll probably have to learn to be hidden, or move unheard through a room, so people don't know you're there to begin with.
Its not always like that, but its typically along the lines of "I want to do <x>, and <y> skill is related, so maybe I'll work on <y> skill for a while".
If a concept is BUILT on you having a particular skill at the outset, you can use a subguild. For example, if you absolutely MUST be able to hide? Find a subguild that comes with hide. In time, you'll learn some good combinations, and awesome flavor subguilds that really flesh you out as a person, not just a skill set.