@Zoe1, When was the last time you drove a recently manufactured car? If the cars you drive are all at least a few years old then you are potentially in for a BIG and perhaps very frustrating experience when get behind the wheel of anything sold recently. Cars are becoming more computers than what we used to think of as cars.
The new site may seem complex & cluttered but my perspective is that it is a lot less cluttered than the previous Ning site. A lot of effort has been put into the design ... and continues to be added ... in an attempt to help guide new people in using the various features Discourse supports.
For example, rather than only providing help information in some hidden away, obscure "documentation" section, there are numerous "pop up" help messages such as the one below which just popped up for me.
Also, if you are not certain what some button or other icon does, try hovering the mouse over it to see if a bubble message pops up giving more detail.