What are some cupcake and cookie recipes?

I’m 13 years old and I’m planning to have a bakesale. I want to sell cupcakes and cookies but I’m not sure how to make them. I googled it but I couldnt find a simple vanilla cupcake and chocolate chip cookie recipe. I’m looking for a list of ingredients needed and step by step procedures. Icing? Brownies? Also, im not sure how much I should charge for one cupcake or how much for a couple cookies.
Thank you so much<3