aww.. please do not ever say "güevo" or "güeco"!! 
It's true that "hue" has a similar sound to "web" in Spanish, but we don't make it soung like the "g" in give. That initial "h" is aspirated, much more than it is in English words such as "here", for example. It is barely audible in Spanish in words starting "hue".
That said, there are people who tend to use the "güe" pronunciation, but it is (and they are) frowned upon here.
In all other Spanish words, it's true that the "h" is silent as in the Enhlish words "hour" and "heir".
Miriam