Which languges to learn for webdesigning?

I am not sure if this belongs in LLPAT, mods please move this to appropriate thread if required.

I am an engineering graduate, but working in a digital marketing firm right now. The pay is good, but ibwould like to upgrade my skills. So planning on learning website designing. I would like to know which programming languages i need to learn. I don't have much free time as such, so i prefer learnin it online.

I have already taken up html on w3schools. Which other languages should i learn?

Thanks and regards