Spanish Language Course Development

I'm looking for an engaging and comprehensive interactive online Spanish course tailored for beginners. The course should cover grammar, conversational practice, and listening comprehension.

Requirements:
- Structured modules on grammar, vocabulary, and sentence construction
- Interactive exercises for conversational practice
- Audio-visual materials for listening comprehension

Ideal Skills & Experience:
- Experience in creating online language courses
- Strong proficiency in Spanish and teaching methodology
- Familiarity with interactive online learning tools and platforms

Please provide a portfolio of similar work.