Bewerbung auf Englisch

[smoer]

Dear members,

ich schreibe gerade eine englische Bewerbung an eine politische Einrichtung im Ausland und bin mir bei der Adäquanz meiner Formulierungen nicht ganz sicher. Vielleicht könnte ein native speaker mal drüberlesen
1. I see an internship in a foreign-political environment as a grand enrichment (for my development).
2. Not only because of <A> am I concerned with politics, but I also do follow especially international policies with keen interest. 
3. Owing to my current field of work I obtain insight in daily political events. 
4. Due to my membership in <B>, I have polished my rhetorical and presentation skills in both the Debating and Negotiation Club. 

Danke im Voraus! Grüße,
Smoer

[Alyssea]

1. I see an internship in a foreign political environment as an opportunity for grand enrichment (for my development).

2. Not only because of <A> am I concerned with politics, but I also especially follow international policies with a keen interest. 
(I would probably reword sentence 2, as the first clause doesn't really go with the second. You imply in the first that you will state a second reason you're concerned with politics, but you don't state another reason, you just state another facet of politics that interests you. If you really want to say both of those things in the same sentence, I'd change it to "I'm concerned with politics because of <A>, and I also especially follow international policies with a keen interest.")

3. Due to my current field of work, I obtain insight in daily political events. 

4. Due to my membership in <B>, I have polished my rhetorical and presentation skills in both the Debating Club (if these are actual proper titles, you shouldn't leave part of the title out just because another title shares the same word. If not, you should remove the capitalization and "Club" I added.) and Negotiation Club. 

If sentences 3 and 4 are one after another in your application, I'd change one of them to "Because of my...". If not, "Due to my..." sounds better. 

[smoer]

Thank you so much for your feedback Alyssea! I bluntly transleted from perfectly fine German sentences, but I struggled to adapt them to the English traits. I changed my letter as you suggested.