how to properly open my first small business???

Hello, my name is Agustin and I'm currently trying to open up my own business in nampa, id. And I'm in need of lots and lots of help!! I'm currently working in sales but I don't want to work for anyone anymore I want to work for myself and eventually have some actual time and money to do the things I love! I'm trying to start up a drywall and sheet rock business but I'm in need of some huge advice on what I need in order to do it because Iv been getting mixed answers which is fine I need as much info as I can get to do it right the first time!