Time to build a line yourself. Black has an open two on row 7 — (6,7) and (7,7) — with not a single white stone near enough to cap an end, which is exactly the emptiness an open two wants. Grow it into an open three — a line that can still become five on BOTH sides. The open three is the first shape the opponent cannot ignore: left alone for a move, it becomes an open four, and an open four is the game. Either extension works here because the ends are symmetric; in the middlegame you will learn that ends only ever look equal.
Play the move that creates an open three.
Finish this step to move on.