Tinkercad has an arduino simulation system! make an account and navigate to the "circuit" section, you can do the workshop above using the simulator!
these are some great sites to visit, get inspired by, and tools that will make life a lot easier.
https://www.arduino.cc/
https://create.arduino.cc/
https://hackaday.com/category/arduino-hacks/
https://create.arduino.cc/projecthub