First of all, you have to submit your foreign professional qualification from your home country to a competent authority. If the competent authority decides that a further qualification is necessary for the recognition and you can prove sufficient knowledge of German (A2), you can obtain the qualification required in Germany.
Visa for Recognition of Professional Qualifications
Can I obtain a visa to attend qualification programmes in Germany?
Recognition of foreign qualifications enables people who have completed their training abroad to work in their profession in Germany. The process of recognition is what the so-called “recognition offices “do. Sometimes, however, some necessary elements for full recognition of a foreign qualification are missing. If that is the case for you, you can attend a qualification programme in Germany, for example, a technical training course or a job-related German course and then, have your qualification fully recognised. To participate in such a programme, you need a visa or residence permit for the purpose of recognising foreign professional qualifications per Section 16d of the Residence Act.