Hopefully you’re having a good time here! If you want to achieve more specific language skills try out codecademy.com or hackerrank.com (the latter is more to practice and strengthen your skills).
I think FCC is good to learn how all the languages in web dev (and so on) work together - I think this is one of the most important things for you, when you want to work in that field (if you didn’t know already :D)
And without a community it’s always hard to learn new things (as you will know probably)
Hopefully any of my tips are helpful to you (dunno what you already know with your CS degree :o pretty much I assume)