Sorry for so many questions, i'm a noob when it comes to PSUs
Yes, good decision, and yes you will have all the cables and the connectors necessary. Please keep in mind that the connectors notched/tabs must be aligned before plugging in. Take a look at it, its easy to see.
And don't worry about the questions. Make sure you have a good comfort level before you assemble anything. Usually, all the information is clearly outlined in the manuals that accompany the products.