Before anyone gets into details of safety and installation issues, I know they are going to wonder whether you are going to be doing the job under the supervision of a licensed journeyman or master, and what instructions and assistance that person has given (or will be giving) you.
We generally welcome people who are new to the trade and in need of information and assistance. But we tend to worry about apprentices who appear to be getting in over their heads, without the immediate and present help of a more experienced person.
Can I ask you to address this first, before we start answering your question?