Op, you are getting great advice here. I love oatmeal!
I make steel cut or rolled oats on the stove or in the instant pot, and make a big batch at once. Everyone in my house will eat it hot and fresh, but then I put the rest in the refrigerator
and scoop out a bit every morning. I like it cold and re-warmed in the microwave. Cook it with a bit of salt, and then add a tiny bit of sweetener to the large batch if you like a sweetener.
I do a huge variety of topping depending on how I am feeling - but I always take my oatmeal with milk. Just my preference.
Try nuts or nut butter, fresh or dried fruit, coconut shreds, granola...