This is what I have. FYI I am learning still.
No. 1 advice is patience, go more, you will get better.
Ok. Bird spotting.
You hear it chirping. Don't move. Look up at the tree the chirps comes from. Seriously if it is a dense tree, then don't try too hard. Hard to spot, hard to get good photos anyway.
Usually the chirps are high pitch, that means small bird. Small bird likes to move around alot generally. It is possible to sense whether the bird is moving around from changes in its chirping.
case 1: bird moving.
So you just widen your view look up at the tree for shadows and branch movements.
cannot see. move closer and stop, don't keep going closer.
still cannot see? move side ways. you keep moving front, blind spots are still blind spots.
still cannot move closer again, eyes constantly on the tree. usually you cant see the bird it can see you. so it will definitely move.
So you must try to look out for movement as you move forward.
case 2: constant same same loudness and direction that means it is not moving.
look hard. rotate your head and hear clearly. see which angle the chirping is loudness. then the bird should be right in front. look at all the branches.
case 3: desperate? make your advances, big, noisy movements, scare the bird away. you can see it fly out and now you can see which idiotic bird giving you a hard time
Actually usually at the 3-4 time you visit you can somewhat identify chirpings of common birds so you may roughly know where to look.
Kindly tell me what works for you if you tried out.
note: my looking here refers to looking with naked eye. not through viewfinder