Honestly, there are so many different sources where you can read about How do you create a web application. You can also go to reddit. There's a lot of information there. But I would suggest you go to YouTube. Because all the information there is reliable. And personally in my opinion you can find there everything that you are interested in the development
Yes, I go through you tube about web application. But can you suggest me some good resources from where i can get full detailed information?