Of course, you can start by contacting your local public employment service.
There is also the EURES European Job Mobility Portal, which links together over 5,000 local public employment offices throughout Europe, connecting jobseekers with employers and offering active support services.
What age can you start working?
Under the EU-wide ban on child labour, you're not allowed to work if you are under 15 or still in full-time compulsory education – though there are one or two exceptions where you can work at 13 or 14.
There are also EU health and safety rules specifically designed to protect young people under 18. For example, they identify jobs not suitable for young people – jobs that exceed your mental or physical capacities or involve harmful exposure to dangerous substances.
Boost your chances
Take the time and effort to write a good CV