The angle of the wing tells you how high the nose is, and suggests (but does not require) that we are climbing. The angle of attack, whether the plane is level, nose up or nose down, is the speed control on an airplane. Nose up is slower, down is faster, level-ish is 'just like that'. Whether a plane is rising or sinking is controlled by the engine throttle - more power than needed for level flight and you climb. Less and you dive.

This seems contrary to a child's intuition or movies/videos/cartoons we have all seen, but makes sense on reflection. Whether the plane gains altitude is surely dependent on how hard the engines are driving it. For a time in seconds, where the nose points affects rising or falling, to be sure, but over minutes it has to be the throttle. One can only climb 1000s of feet by adding work.

Similarly, whether a plane is steady, accelerating forward or decelerating, cannot avoid being influenced by changing the throttle, but over a period of minutes, with the throttle steady, what actually sets the forward speed is the angle the wings meet the air. Nose up slows the plane through the air, nose down speeds it up. That's why rule #1 when your wing is stalled or near stalling is to put the nose down. NOW. Playing with the throttle may well be important over the longer term, but to increase speed through the air, point the nose down. Period.