A German course at B1 level takes you from basic to independent language use: everyday life, work and dealings with public authorities become manageable on your own. Most courses also prepare you for the telc B1 exam or the DTZ.
Leipzig's universities give it a dense offering of university-preparation courses and exams at B2 and C1 level.
There is nothing currently scheduled for German Course B1 in Leipzig. The language schools here still take enquiries.