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.
What makes a language easier or more difficult to learn compared to other languages will not entirely depend on your native tongue or other languages that you are already familiar with. There are certainly some personal factors such as your listening ability, memory, and natural ability to learn languages.