As you said - beginner outfit that you can use for trout. Yes - of course you can start with that. You might find that you really like it and will stick with that set-up for a while. You'll probably find you might want to try something else.
A single hand 5wt would be more practical to start with - more comfortable to strip with but it all comes down to personal choice.
Research on the "Net to figure out how to use it and then go use it.
You may not have the best combo of lines to the rod but go for it. Put the 6wt floater on to start with.
You can start with a straight 8' leader of 8# mono. If you have time to practice in a field, tie on a little piece of bright wool instead of a hook. Remember you are casting the line, not the hook.
Try get a flyfisherman friend to help you with the casting and don't expect to launch 90-100' of line. Work on consistently getting three rod lengths of line out and you can fish with that.
Do the research and get some help. Only practice quality casting techniques - there is no use practicing poor casting techniques.