Answer upfront any questions they might have before buying your course. Collect all pre-sale questions and add them here. For every person willing to ask the question via mail, social media, forum,... dozens of others have the same question but never ask and leave your site without buying.

Explain exactly how they will get access to the online material.

One of the biggest concerns with online courses is that they can disappear. Address this concern.

Make sure to give an easy way to contact you to ask other questions.

Don't avoid "tricky" questions. Be as open as possible, this will create trust.

If you know that many people compare your product to the competitor's, be very clear about why yours is different (and better). Don't stick your head in the sand, it's better to give them the information here than to have them go away to Google it.

The big advantage of toggles is that you can add a lot of questions without cluttering your sales page!

Show your personality in the answers. This is another opportunity to create a positive experience for your (future) customers.