Ours is now 24-30 weeks. 8 hours/day, 5 days/week. That's just to become a probie. Then after a total of 18 months(10-12 on the street) that include a ton of tests you can eventually become a normal firefighter.
In Croatia, you must be 18 or older.
For a volunteer, you must be healthy, and have a finished training for a volunteer.
Younger than 18 can only partecipate in competitions. Partecipation in interventions is prohibited by laws.
In reality the situation is different.
For a professional firefighter you must pass phisical and mental tests, finish firefighter school, also you must be with no criminal record.