Learn the calls before you buy a longer lens
Beginners spend money on reach and then wonder why their lists stay short. The truth of birding is that the ear finds far more than the eye. In thick acacia or forest edge, nine birds in ten announce themselves before they ever show, and if you cannot place the call you will walk straight past them.
Start with the ten commonest voices of wherever you are. Not the rarities — the background. Once the ordinary chorus is familiar, the unusual note lifts out of it on its own, and that note is where the interesting birds are.

A cheap recorder and a season of patience will do more for your list than any lens. The lens only matters once you already know where to point it.
This log leans on that order deliberately. Where we can, each species page notes the call first and the plumage second, because that is the order you meet them in the field.