Take a look at https://ultimateelectronicsbook.com/ https://ultimateelectronicsbook.com/ It starts with fundamentals and includes in-browser circuit simulator

Take a look at https://ultimateelectronicsbook.com/ https://ultimateelectronicsbook.com/ It starts with fundamentals and includes in-browser circuit simulator to experiment with. Once you have the fundamentals, something like "The Art of Electronics" by Horowitz and Hill is useful for rules of thumb and do's and don'ts of circuit design. Warning: this book by itself will not teach you enough fundamentals to be useful.