I came across @CircuitVerse while preparing for a logic design discussion with a few students. I was amazed at how well this app has been designed and how it has all the required details to get you started (including tutorials, documentation, and a learning book). This is helpful for anyone trying to understand the low-level circuit designs of computer systems. It is highly recommended to play around with basic gates and build upon something fascinating, such as this Tic-Tac-Toe example from one of the users (Trương Ngọc Long) on the platform. Links in the thread.