Pick a circuit, then build it: click a board pin, then click a part terminal, and a wire joins them. When you think it is right, hit Power on. The board reacts the way the real one would: it reads the sensor and prints to the serial monitor, or it does nothing and tells you why. Every wrong branch here is a mistake that costs you a part or an afternoon on the bench.
Click a pin then a part terminal to wire them. Click a wire to remove it. This is a wiring view: the board lists the pins you need by name, not in their physical order, and the pinout explorer shows where each one sits on the real board. The board pins are colored the way the pinout explorer colors them: green ADC1, amber ADC2, orange strapping, red PSRAM.