I sometimes put too much oil in my cooking, and then I found it when I put the food in it. I just fished out some oil with a clean spoon and then fried it. After a few more times, I would have experience. Nowadays, people don't just put soybean oil in cooking. Some families eat blended oil, corn oil and sunflower oil. If you just start to learn cooking, you can practice with corn oil or sunflower oil, even if you put too much oil in your dishes, because I think these two oils are relatively light. Pure fragrant soybean oil has a strong flavor. I have to squeeze it out before cooking with it, so people often use pure fragrant soybean oil when frying things. It's the dark oil, and the light oil is soybean salad oil.