Welcome to #Steemit Marcin. Be active in the community, comment on blogs you find interesting, upvote those who you think are worth to be upvoted, resteem articles you really like and just write unique content or upload unique video's on #Dtube or add your music to #Dsound.
Steemit is all about all of us building this community and keeping it strong. And for that, you also get paid. Try not to copy and paste, but to add interesting and unique content.
@artakush and @minigunner welcome you to @steemit community ;)