I have played for 2.5 years and still playing it a plex goes for about 350million isk and to be able to do that kind of money you need to do mining or level 4 pve missions or start pirating I would take you at least 3-5month to get to a point where you can get at least so far where you can earn allot of isk if solo playing or you can join a corp that can help you out.