I mean, how's your Linux command line these days?

https://docs.mau.fi/bridges/go/setup.html?bridge=signal is the setup for the Signal bridge, and you'll also need to look at the initial config setup. Once you have a working Matrix homeserver, it's mostly "Create a new database table, point the bridge at it, add the proper incantations to your homeserver config so it knows the bridge is permitted, and start things up."

I don't find it bad in the slightest, but I'm also a legacy Linux sysadmin sort.

There are also Docker methods of doing it, if you prefer that: https://docs.mau.fi/bridges/general/docker-setup.html?bridge...

If you're a GUI-only sort, it will be painful. If you're competent with older styles of Linux sysadmin, it's fairly straightforward, though getting Matrix federation working reliably can be a slight pain. Just make sure your certs update...