Is Rockhopper Exploration; AIM:RKH.L a good buy. I just opened up a share dealing account today, and I was....?

I am 18 years old and I have just officially opened up a share dealing account with my bank so I can now invest after years of bitching. I was wondering, my brother told me about this new oil company Rockhopper Exploration, stock ticker symbol, (RKH.L), and I've done my research on the company. Do you think it is a good idea to buy into it as it is expected to go up 320% this year if they find the oil off of the coast of the falklands? Please, I really need your advice. Thanks.