The best way to make your scrambled eggs really fluffy and creamy at the same time is to add milk to your recipe. How much do you need to add? Not more than 5 teaspoons of milk per egg. Also make sure that you do not over beat the egg/s as this will result in thinner (less fluffy) scrambled eggs.
More tips for fluffier scrambled eggs: do not add water as this will make the mixture thinner. Also, use a nonstick pan that’s not too big. If it is too big, the mixture will spread out too much and make your scrambled eggs thin as well.