I learned when I was 10.
Look on all recipes.com
Find a recipe with lots of high ratings
Make sure to follow the recipe to a T, messing up even 1tsp of something like baking soda/powder can mess up the whole recipe
Don’t jump in the kitchen while the cake is cooking
Don’t open the oven to check on the cake, you’ll let 100 degrees every time you open it.
Homemade frosting: blend powdered sugar and crisco, adding small amts of water or milk (if you use milk put it in the fridge.)