I'd suggest to start with your talents. What are you good at? Have you got any skills, natural or developed over time? What do you find easy to do? What do you enjoy doing? Say for example you're very good at football and/or other ball games, and that you grew up looking after your younger siblings and enjoyed playing with them. So perhaps you could become a fantastic football coach! Think about your strengths and the areas or fields of life you enjoy spending time on the most.
Beside a graduate/training certificate or equivalent for the job or profession you choose, most jobs out there require an above-average level of computer & numeracy literacy, as well as customer service or communication skills. Another desirable skill is languages, which can open up the doors to a wide range of jobs across all sectors.
There's a lot of experts giving valuable advice on talent and careers via Ted Talks, which you can find in YouTube. Here's one to get you started: https://www.youtube.com/watch?v=8Swu8iiuFx4