I kinda want to expand my repertoire with some web development skills. I already know some front end .net. What do you suggest I start with? I heard someone say react+PHP is a good combo

If you want to do both frontend and backend, then nodejs and react will be a better combo at first than react and PHP because it's all JavaScript.

When going full stack a php developer must learn JavaScript as well.

That being said, you'll will get good enough results with PHP. I'm not a flamer and I personally find its frameworks (e.g. symfony, Silex) more mature than its nodejs counterparts (express, SailJS).

Both the PHP and JavaScript worlds are full of script kiddies, so finding resources that teach you solid programming is a deep dive.

Yet instead of learning JavaScript I recommend learning typescript first :D

Welcome to the learning hell that is web development ^^

That being said: learn programming. Languages are than merely syntax and semantics.

@k0pernikus Thank you for your advice! I do try to focus on the basics of programming as much as I can. The thing is that I'm really slow at grasping semantics of different languages so I have to plan and allocate alot of time for it. What would you suggest for a person who knows the basics of python?

@Kur0yan Have a look at Django.