You need to take a look here:
Air Traffic Controller Licensing | Air Traffic Standards | Safety Regulation
You need to be properly trained to be a controller. The requirements and licences are similar to those required for pilots. Training from scratch can take several years and I cannot imagine anyone with a real interest in the profession finding NATS courses "boring"! If you manage to get into NATS you will receive thorough training with the possibility of an excellent job for life.
There are other ways to train; several private ATC colleges take on paying students but the fees are high and there is rarely a guarantee of a job at the end.
Good luck..