Some expressions from my cover letter

Hello?

I'm not sure whether some of the expressions I have used in my cover letter are OK. Can anyone help me?

1."Referring to the advertisement published on your webpage, I am writing to apply for the position
of a ***."

2. "I also gained relevant practical experience, absolving successfully internships in *** and in *** as well as at ***, where I was dealing with various aspects of European and public policy affairs."

3. "Currently, I am a public service employee, responsible mainly for preparing and coordinating publicity activities of *** in the field of European integration as well as implementing the *** Programme."

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4. "Having gained some relevant practical experience in the field of *** I would like to pursue this type of work further, however from a new interesting perspective."

5. "My motivation for applying for the post at *** is to acquire new competence... 

6. I feel that my insight into the functioning of *** would prove valuable in this post.

I would be grateful if anyone could comment on this.

Dear nona the brit!

Thanks a lot for your help

Does "completing successfully internships..." (2.) sound better?

In 5. I mean "I feel that my insight into the functioning of public administration..." Is that OK?

Thank you in advance!

Hi

All ok except for the word order in

completing successfully internships.

Make it successfully completing internships and it is fine.

Good luck.