There is no active Bitcoin pages in Facebook , not even one as far as I know . It would be better If you buy "whybitcoin.info" or "whybitcoin.net" domains (they are available : https://www.godaddy.com/domains/searchresults.aspx?checkAvail=1&tmskey=&domainToCheck=whybitcoin.info ) and make a simple website layout or use Jekyll instead.
Having a website in addition to the Facebok page is a great idea! I should definitely consider making one
However, the best and most efficient way to get someone interested in something is trough Facebook. Everybody is on social networks nowadays and has his attention there.
Then you should probably start promoting it either by paying or by sharing the content of the page in different groups . You shouldn't target random people or use exchange websites like Addmefast because they are bots .
Instead , target people interested in privacy/security and mostly programmers , those kind of people are the first who get interested.
Great! I will absolutely use your advice