Start with this page:
The biggest chance you have of getting a job in Antarctica is going along to interviews / recruitment fairs. If you are in Croatia and can't travel, then you've virtually no chance. If you have skills AND aptitude AND are available to be seen, then things start to look a lot brighter. There are far more people wanting jobs than there are jobs, if it was you that was recruiting, would you appont someone you'd met or someone you hadn't, but had just written?