Well, everything seems to be working for you - a great family and a decent income. The mere fact that you have a loving wife and children, and your salary is able to cover most, if not all, the things you and your family needs. Raising two children at this times is no joke but since you admitted that you are able to provide for your family's needs and more, means you have a lot to be thankful for. Many people would like to be in your shoe.
I do agree that working as an employee for 8 years can be boring and many people dreamed of having their own businesses. For now, I'd advise you to think more responsibly by appreciating that you have a decent job with decent pay. You don't have to love your job but try to think about your family's welfare so that you won't feel miserable each day you go to work. Try to look at the glass half full by thinking that you only work 8 to 9 hours a day and the rest of the time you spend it with your loving family. I'm sure you would rather be in your present situation than to see your family having nothing to eat because you got unhappy with work and quit(just in case you got fed up).
It's not easy to start a business these days. Small to medium size businesses like sari-sari store, laundry, water refilling stations are many and competition is fierce to the point that they started killing each other by lowering their selling prices which, in turn, screw them up. Big businesses need huge capital. I'm not saying you can't start your own business, of course you can but not now because you are all stressed out as if you are having a problem making ends meet which, obviously, you don't.
For now, go to work as an employee as usual. You're still young and you can still earn a lot of money with your age and energy and not to mention that your family will serve as additional inspiration. I'm sure no matter how much you hate being an employee, you feel happy if you were able to provide the needs of your family and you see them happy after a full meal. So continue going to work but instead of thinking where life will lead you just work hard for the money and for your family. Heck, even starting a business requires money (capital) so continue working and start saving and just go with the flow. If having a business is meant to be it will definitely happen. Additionally, with your current dilemma and mindset, you can't think straight so take one step at a time by working and saving. I think one thing that covid-19 pandemic has taught us, is always save for rainy days.
Again, with your current mindset and frustrations, it will be difficult for you to think straight much more think of a business. For now just relax, because you are just making yourself miserable without making any difference. Believe me, it is more difficult to be working as an employee with meager salary and barely making ends meet while seeing the kids not being able to buy nice toys and clothes and eating unhealthy food. So try to be happy for now and try to look at the bright side for your family especially your children.