!rant but question to you experts:

Hey, guys. I'm currently trying to up my game in terms of web development. I already know js, html, php and css quite well (enough to become a tutor at my university) but I'm not shure which frameworks (serverside and clientside) are worth considering. Until now I wrote everything from scratch, which is not very sustainable (waaaay to much code to maintain)
Could you please tell me your softwarestacks, what library to use, which frameworks to learn (Vue/React/Angular/...)? Every opinion is very appreciated and won't go unheard. Thanks in advance.

btw: you guys are the nicest people I ever met online. Thank you for being so awesome.