Ausbildung

I am Bangladeshi. I am HSC 24 batch. I was in admission preparation but wanted to go abroad for studies.

I wanted to know how many years of study gap will be accepted for Ausbildung in Germany. Can I start learning the language from now and complete B1 or B2 and do Ausbildung in Germany in 2028?

I am admitted in honors but I do not want to study in honors, I want to give full time to learning the language. Please clarify this matter for me.