When you run tmux, you create a new Session.
In that session, you are put into a Window (usually 0)
In that window, you can create panes (usually [prefix]+” and [prefix]+% depending on horizonal or vertical)

To create a new window, [prefix] + c

So each window will have a statusbar at the bottom, yet each window will share the same list of available windows in the session looking like:

1:~main* 2:~alternate-

To change a window name, use [prefix] + ,
To switch windows, use [prefix] + window#

More on shortcuts here!

And speaking of this, I actually did some preliminary searching for something that would enable me to save layouts for sessions and windows..I havent tried it yet but this looks very promising:

Mario Loria is a builder of diverse infrastructure with modern workloads on both bare-metal and cloud platforms. He's traversed roles in system administration, network engineering, and DevOps. You can learn more about him here.