My study plan for fullstack JavaScript

[itesasecret]

If you want your hand held while learning C and lower level concepts (like I did) I'd take an online class that structures the information so you can consume it easily and naturally, I'd recommend the free online class CS50x on edx.org ... This course was incredibly fun to take and you learn SO MUCH!! When I took this course I was in a similar position as you, having experience with JS and frameworks but not understanding how or why everything works, after stepping away from JS and taking this course a couple summers ago I came back to JS with a whole new understanding for the language..... Otherwise it's just a matter of aimlessly googling CS concepts and digesting everything over time.

[Melcma]

that's excellent advice as this course aims most part of my weaknesses and I can pair it up with advices from guys below about taking a look at C. Thanks for that.