Don't be intimidated.
The master and slave cylinders are held on the vehicle by a total of 4 bolts, 2 for the master and 2 for the slave.
You just remove the old master (2 bolts, right on the driver's side firewall under the hood) and then go into the pedal area and take out 1 cotter pin holding the arm to the clutch pedal.
Then, you go under the jeep (no need to jack it up at all) and find the other end where the slave is. 2 more bolts and it's out.
Then just replace how you removed, but check if your new assembly is pre-bled or not.
I'd recommend reattaching the master cylinder first, then open the cap and see if there's fluid in the part you got. If so, then just bolt on the slave as described earlier. If not, bleed as described earlier, then bolt slave back on. It's easy to bleed it with the master attached and the slave not attached. One person job.
In my opinion, the level of difficulty is right around the same as replacing brake pads, meaning pretty easy. Maybe a little easier because you don't even have to jack up the jeep.