Welcome, you made the right choice!
I have the Elago slim fit case in black (which is very similar to yours but black) and the same Sandisk class 10 from amazon. So you have great taste
Rooting is great. Its like....imagine never having been married. Let that sink in for a second.... R u feeling the possibilities?...the freedom to do what ever you want (talkin about the phone lol)? Its kinda like that
The risk is rather low Id say (rooting) but the benefits are very real and very usefull. Dont rush into rooting tho, I enjoyed my stock phone for a whole day before i rooted