Let your visitors know how to get in touch with you. Most course-building sites have a couple of templates for you to use to automate this process, including having your visitor (audience) complete a brief form that will be sent directly to your email.
Personal info - how much do you want to provide? Keep your safety, as well as spam and other types of unwanted attention in mind. Do NOT share your phone number or home address.
If you like, you can be specific about what you're interested in if you want a particular kind of connection. For example, "to discuss Topic X, complete this brief form"
For all content - images, text, video, etc. follow these tips to design your information with the audience in mind!