Good resource on construction models for Volatility Surface

[fullofquestions]

I was wondering if you have a good resource on basic model(s) for constructing a volatility surface. Hopefully something not too complex but with real world use. I've found quite a few online articles on Volatility Surfaces/ Cap Volatility Surfaces, etc., but so far all are a bit too technical; at the very least they don't take you from 0 to having constructed a Volatility Surface. Anything you have is much appreciated.

Thanks.