Course Creator

I am a Producer and Director that is helping a client to create videos for an online course but I need someone who is proficient in course building to actually help me execute the client's vision. This will include all course building elements including a landing page and graphics.

Can you tell me:
How long you have been building courses for?
Add links to courses you have built
Tell me what course platforms you prefer and why?

Please include your email and What's App as well.