I think this wiki cheetsheet will explain some of the defaults. Pretty much everything is controlled with a keybind using the meta/super (windows) key. Mod + d
should open the launcher, I only used dmenu but yours might be something else. The launcher will let you launch applications by name. If you just want a terminal, Mod + Enter
will open one.
You will want to look at your config. It should live in ~/.config/sway/config
. If it’s not there then mkdir ~/.config/sway/ && cp /etc/sway/config ~/.config/sway/
. That should list the keybinds you have set. You can look up the options in the man page for sway.
Once you can do some basic window control, you might want to customise the status bar. The config should tell you what bar is being used, but there are a huge array of statusbars to choose from - I used i3status-rust but try searching for i3/sway statusbars to see what’s out there.
Barrier is only for inputs IIRC. To get Keyboard Mouse and Video (more usually KVM) you need some kind of remote desktop software. Rustdesk is pretty straightforward. I think Gnome handles RDP access natively now if you’re running a Gnome based Linux distro. Otherwise XRDP is a bit of a faff, but solid once it’s working.