Whether you're currently studying, just starting work, or have work experience but are thinking of changing your industry, there are many free on-line resources to help you explore the cyber security industry:
There are also opportunities, often subsidised or free, to attend cyber security boot camps or summer schools. You should be able to find information easily online about these. The CyberFirst programme, run by the NCSC, includes a wide range of such events and competitions for those at school and some support for those at university. You can also find out more information on the Cyber Choices site.
Remember: employers welcome people:
Apprenticeships offer a great way to enter the UK cyber security industry. Get paid to learn.