The truth is that you need both... just not at the same time. One naturally hinges on the substance of the other. How do you become more clear and confident? You take action.
The real question is where do you need to begin? Clarity. Without clarity there is no confidence - just the constant search for validation & acceptance from person to person, in relationships, from job to job. Don't believe me? Let's chat then...
Think of the times you've taken on a position at a new job. There's always some level of nerves or apprehension - especially if you're under review for your first 90 days. You show up not knowing what to expect and even though they train you, the moments when you're left alone leave you feeling out of place.
Let's fast forward now and consider when you've been on the job for a year. You've developed relationships with co workers, have leveled up to a new position and have even trained a few other employees to do what you once did.
That's the difference experience makes. The clearer you become on what's expected of you and what you need to do, the easier it is to transition to confidence. There's much less fear of messing up.
It's hard for us to step out and try something new when the old feels comfortable.