Hey!
I worked with Joomal! for a while but found it very confusing on how to build a website. It consists of Components, Articles, Menus, ... It's like a little puzzle where articles in components connected to a menu at some point form the website. It was quite hard for me to get started so eventually I moved away from Joomla!...
There is an easy way to try it out by installing
XAMPP on your Mac and try it on your localhost...
Hope that helps!