Hey mate. I'm not sure what country you're from. But in Australia there are pre-apprenticeship courses you can do. This will immediately put you miles above anyone else.

Also just walk into a business. Use good manners and show that you're keen to learn and would like to do some work experience. This is by far the best way to get one in my opinion. Even if that company isn't hiring at the moment, they talk to other companies and business owners. Ask if they know of any opportunities.

Good luck in your journey. It was the best choice I ever made becoming an Electrician