Website Planning

I met with my tech people (wink, wink) and began planning for a website. I've done some preliminary research about what I like/don't like, want/don't want. Now the time has come to make decisions about specifics for each page: how many pages, how people will navigate through the site, what will appear on each page, and many other things I don't know anything about. I'm told I need to select a Content Management System. I'm considering Big Blue Hat, but I need to give it a trial run first. I'm told it's easier than many--and I'm such a techno-infant.