June to August in Europe is known as High Season (which means you can expect wonderful summer weather but the downside is quite a few crowds). Any destination in Europe will be a great destination during high season.
If you really put your mind to it, and constantly expose yourself to a language then you may find that you can speak it with relative ease within about 6 months, although as mentioned before, you would really need to be living in a country that speaks that language in order to get to this stage.
Understanding language is one of the hardest things your brain does. The benefits of learning a second language seem, in fact, to be proportional to the effort expended by the brain. Because language is complex, speaking or learning a foreign language gives your brain a good workout.