Hi @lauriektighe82 and welcome to the forum,
I can see Arabic 1 - 4 (and others) on your profile page. You should be able to start Arabic 5, 6 and 7 by selecting them from the course library at: Memrise - Arabic - Courses for English speakers on the web version or by tapping the yellow “Learn another course” button" > “Arabic” > “Browse more courses”, if you are using the app version.
You can select any course in any subject and add them to your dashboard without needing to achieve any kind of points total.- although ‘user created courses’ can’t be added from the app version. These have to be commenced on the web version before they will sync across to the app.
Hope this helps. Sorry if I have misunderstood the issue.