Out of curiosity I leaned C, C++, Python (since I started with Linux), FORTRAN & PHP. How can I teach myself serious web development (step by step)?

[Aron]

Hello everyone, I would like to know if you can explain to me out of curiosity i leaned c, c++, python (since i started with linux), fortran & php. how can i teach myself serious web development (step by step)? Please kindly inform me Help.