My confidence is constantly increasing.

There's a dip that arrives about three weeks into anything new and it feels exactly like decline. It isn't. It is the point where you know enough to see how much you are getting wrong. Beginners are cheerful precisely because they cannot yet perceive their own errors. So a drop in confidence is often a rise in competence, arriving early and badly dressed.

Constant increase, then, was never a smooth line. Anyone learning an instrument knows the week where they suddenly sound worse to themselves, which is the same week their ear got better.