Hi! I am trying to learn German now and I am a native English speaker from the US. I think German is relatively difficult. I have learned some Spanish before and I think German is much more difficult due to the complicated cases (dative, accusative, etc) and having to memorize the articles for all nouns (der, die, das). This is especially tough because we don't have any equivalent in English! I also find pronunciation in German to be challenging, but I'm getting much better than when I started learning. But, that being said, I think German is easier than say, Russian or Japanese. So, it's all relative!
Good luck on your exchange in the US! where are you living for your exchange?