Hopefully it will work out well for you.
I suggest starting with 3 birds of different breeds
and do not try to put 6 in there. All though they say it will fit 8... It may work, but it's best to avoid overcrowding and the problems associated with it. Then if you get a bigger coop built next year, maybe add 3 new girls who will lay eggs while your first 3 molt and don't lay eggs... Lots of things can change between now and then, as I have seen for myself.
Have fun!
I suggest starting with 3 birds of different breeds
Have fun!