Practise a tournament draft
Take blue or red and draft all twenty turns against the engine. At the end you get the win chance of your composition and what drove it. Or test your reading of the game: guess the engine's move in its example drafts.
Light, player-blind model in your browser. The full tool also knows all ten players.
How the practice engine plays
One move ahead, with the rest filled in
For each candidate ban or pick, the engine finishes the draft for both sides by taking, in turn order, the best champion for an open role, then scores the result. It plays the move with the best score for its side. In a double decision it chooses both moves together.
What the win chance means
The score adds champion strength, lane matchups and synergies for both teams. It is player-blind: it does not know who plays what. Small differences matter: a few points of win chance from the draft alone is a real edge.