wadup ppl? pls help im a racer(drifter) in south africa and im kak gud...prob is im a demo racer with no cash to buy a licence!!! please help any111

Hey wassup ppl?
I have a prob im a new racer from south africa and i only got the demo i wanna unlock s1 and s2 but dont have a credit card...any advice?oh how much is 24GB in RAnds?