Go to Autozone’s website, register an email address, plug in the car’s info, and go to the Repair Guides section. Find the ignition section. It should tell you which wires are which on the harness for the coil pack and how to check for voltage so that you can double-check. It may also tell you how to check the resistance on the coil pack - that’s not a full check but you can at least tell if its definitely bad.
I’d do that before jumping into the expenses of a tow truck and paying a shop for both diagnostics and then parts. If the coil pack is bad, you’re probably just looking at something like $60 for a new one, and as you can see it is a breeze to install.