Confused about setting up MATE desktop

[Michael Huff]

Hi

I'm building MATE from pkgsrc 2021Q2 in a VirtualBox machine (amd64) and 
so far so good. However, I realize that I'm probably missing a lot of 
steps and I'm not having great luck finding out what all I need to 
build, enable or add to rc.conf. Dbus is an obvious one, but after that 
I have no idea.

Can anyone fill me in on what configuration steps I need to take after 
building and installing meta-pkgs/mate?

Additionally, I'm not able to find a mixer app or applet to adjust the 
sound volume from the desktop (or even cli) -it looks like one's not 
included? What should I build and install ?

Thanks!