Hello havfru, and welcome to the forum.
I don't understand the text highlighted in blue. Also if you're addressing this letter "dear sir/madam", use "yours faithfully."
I am writing to apply for an internship position with your company, starting in February 2018.
I found your advertisement for the above position, which I foundon the official website of your company,has interested meand I am very much interested in this internship.andI have the pleasure in enclosing my curriculum vitae as well as my university transcripts with this application.
Currently, I am in the process of completing my studies of xxxx at the University of xxxx. , The internship is held in the framework of my studies and should ideally last at last three and up to four months. Hence, an internship in the Social Media Department of your company would give me the opportunity to gain significant workingexperience in arelevantfield relevant toofmy studies.
As you can see from my résumé, I also have a bachelor’s in applied communications, which I obtained at xxxx.
Being an expat myself who has lived in XXXX, I am intimately familiar with the challenges an expat has to face, knowing from first-hand experience what it really means to become immersed in a culture different from your own, but also what advantages a stay abroad can offer on both a personal and a professional level.
My previous experience as a PR and marketing intern in a NGO and a company [Are these two different internships?] that focuses on healthcare products during which I helped to manage social media, wrote articles and carried out other administrative tasks, makes me a well-qualified applicant for this position.
I am highly motivated and, thanks to my experience, I am capable of succeeding in a deadline-driven environment andtoof working both independentlyon my own initiativeand as part of a team.
I am excited by the chance to contribute to your organization and am prepared to engage in continuous learning.
For the above reasons,I would particularly welcome the opportunityof discussing the possibilitiesdiscuss my application at an interview. I can be contacted on xxxx.
Yours sincerely,

Student or Learner