That shouldn't stop you. three.js makes webGL really easy to write, and most of the maths can be borrowed from other code. You can do some pretty awesome stuff with only a basic knowledge of JS. It's very rewarding to give it a try. My math-fu sucks but I've still been able to make fun things like http://library.ooer.com/2015/11/15/Cube-Ocean/

I didn't mean they were non-existant, just that it was nowhere near up to this level.

There's a bit of a write-up coming up!