The middlegame's first question is not where you can make a three, but which three is worth making. A shape near your other stones has follow-up: every later stone reinforces it. A shape on an isolated wing wins space nobody came to claim. Here black has a pair on the central row and a second pair far away in the corner — the corner pair also makes a three, but white sits right at its far end, so that three is capped before it is even born. Find the point that makes a genuine open three on the strong wing. White answers the real three — and the corner pair is suddenly pointing the right way, behind white's back.
Finish this step to move on.