at this stage you cant invest directly , follow this link , and it will give you a heads up , about where to be placed, when it is listed ,
also read the link try to understand this operation, then you will understand that SAS is just a backyard operation trying to get off the ground with no money and no chance of ever getting funding, the space age is off and running , SAS cant even make it to the first hurdle ,, never mind getting over it ,,,
and beer money CR's will never do it ,,, check the amounts these guys raise
https://www.istrategyconference.com/how-can-i-invest-in-spacex/