1. Go to Window –> Perspective –> Open Perspective –> Other…

2. Select Force.com.

3. Select File –> New –> Force.com Project.

4. Enter your login credentials.

5. Click “Finish”.

To practice more, create Class, Visualforce pages, Triggers etc.. using Force.com IDE. All you have to select is File –> New and then select Class or Trigger or what component you want to create.

Cheers!!!