Technology stack to develop modern web apps

Good evening, I am a student of computer engineering and in a year if all goes well I should have graduated. Thanks to an exam of my degree course, I discovered my passion for the world of app and web app development. I would therefore like to become an expert full stack developer in this field. Unfortunately in my course I only receive a small knowledge base of this world. So I ask you who are experts in this sector, what technologies do I have to learn to become an expert developer, especially of web apps? What are the most requested technologies in the world of work in this field? I have a good knowledge of the java language, good knowledge of the javaFX framework, sql language and databse in general But doing research on the web I read that javaFX is not used in the web, but only to develop desktop apps and with a project carried out by Gluon also to develop mobile apps. I would like to take extra courses in addition to university courses to learn how to develop modern web apps. Reading around I have seen that there are many technologies used in the web and I am particularly confused. I don't know which path to follow. Which tech stack should i learn? Sorry if my question may seem silly to experts like you but I would be very grateful if you would help me direct me to the right path to follow.