Immigrationboards.com

can anyone send me links and advices how to arrange an interview, if I have to fill in any forms before an interview etc

pick up a form at the post office, fill it in with referees and photo, submit at post office or post directly, wait for letter for interview, attend interview, wait for passport.

https://www.gov.uk/apply-renew-passport

if I am Eu citizenship and I got now a British citizenship certificate, do I have to send my birth certificate or other documents from my Eu original country to apply for the first passport?

Read the links I have provided. Documents are clearly listed on the form and in the guide :

https://www.gov.uk/apply-first-adult-pa ... pplication

FAQs in the link below, scroll down to Passport section

http://www.immigrationboards.com/britis ... 95747.html