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.
The building blocks of language: Babies can learn basic words by age six months due to their exposure to what their parents and siblings might talk about. It was thought that children of that age could understand elements of the sound of their own native language but not connect the sounds to meanings.