forum.excito.com

First of all I´m such a noob writing in english ...

My Problem... I need a good tutorial (step by step getting Owncloud 9 to my B3.
If there is a way to do that i need your help!

for the future you probably need to look out for nextcloud.
but I suggest starting with "apt-get install owncloud"

I recommend using the Owncloud repositories (ahoff's link) to install it instead of the Debian one's, because they are severily outdated (7.x vs current stable 9.x).
The Documentation on their website and especially the Administration manual is also advisable.
If you are planning on letting more than one user connect to your owncloud, you should consider using a real database (MySQL or Postgres) for performance reasons.