Hello IJ, welcome on board.
Getting a business idea isn't that difficult. Am sure you must have nutured some in your mind but a good one to start with would be to examine your self critically.
1. What are you good at dooing?
2. What skills do you have?
3. Can the skills you be commercialize?
4. Who are the competitors in your location?
5. Do you think you can do better than them?
If you have answers to these few questions, then I think you'll have a good business and you are good to pursue it.
Feel free to ask more questions please.