In addition to the means already mentioned above, there are numerous other opportunities online and in Heilbronn to learn German, including commercial language schools. Please keep in mind that not all courses are free or subsidized. In some cases you will have to sign a contract that will obligate you to pay for the course even if you are unable to complete it. Always inform yourself well before you sign anything. Maybe there are other courses available to you that are more suited to your needs. You can inform yourself at e.g. counseling centers for immigrants (Migrationsberatungsstellen) or the Information Center for Integration Courses.