Test and refine content for language learning Application

I am looking for a language learning expert to help me test and refine the exercises in my language learning application. The target proficiency level for the learners is beginner and the language that needs to be tested and refined is Hindi.

Ideal skills and experience:
- Strong knowledge and understanding of Hindi and English grammar
- Understanding of beginner level language learning needs
- Attention to detail and ability to provide constructive feedback
- Excellent communication skills.