Crossword puzzles

What I really want to do is to be able to solve a crossword puzzle in English. On occasions, crossword puzzles are difficult to do in your mother tongue, let alone in the foreign language. There are numerous sites offering crossword puzzles, but they really seem too difficult to deal with. On the other hand, they are very useful to expend the vocabulary, learn different synonyms, antonyms, idioms etc. One of those sites is:  http://www.boatloadpuzzles.com/playcrossword.