Facebook Ad Button Lead to…

Hi Brooke,
After watching your Entrepreneur videos, the part about Value Before and delivering that via Facebook Ads, I have some ideas that I can do something similar. Instead of just sell, I can have a longer video (I’m an artist and sell my art and art courses online) that actually teach people how to use certain techniques etc.
The question is, with those ads, should I capture their email address or get them to sign up for a particular course right away? Meaning, the click button in the ad, should it direct to a landing page to collect emails or to a sales page of a course? (I would think email?)