On the left-side of your screen there are 3 options:
3D Designs
Circuits
Codeblocks
Select Circuits
In order to start a new circuit, select the green box at the top that says Create new Circuit
Below are some screenshots and explanations of the TinkerCAD workspace.
When you create a new circuit, you will see this workspace. Up at the top left, next to the TinkerCAD logo, is the name of your project (TinkerCAD assigns random names). You can double click on this text to change the name.
These tools are in the upper left side of your window.
1. Rotate: rotates components after they are placed on your workspace
2. Trash: delete components after they are placed on your workspace
3. Undo: undo an action
4. Redo: redo an action
5. Annotate: add notes to your circuit
6: Hide/Reveal Annotations: hides or shows your notes.
These tools are in the upper right side of your window.
Code: opens the window where you can add code to your circuit
Start simulation: Starts simulating your project (turns on power, starts the code, etc.)
These are the components you can add to your circuit. You can scroll through the icons or type the name of the component you want to search for.
The video below explains the workspace in a little more detail
After you place components on the workspace (click on component and drag it into the workspace), you are able to move them around, rotate, etc.
When you select a component, a window shows up identifying the component, and if there are any attributes that can be changed, you are able to do that in this window (e.g. you can change the color of wires and the value of resistors)
In order to connect components with wires, just click on the "leads" and a wire will appear to join them. You can change the colors of your wires at any point after they are placed.