No worries, hope it goes smoothly. The bit I found hardest to wrap my head around was the barrel adjuster part. Basically if your derailleur didn't take a hit, the limit screws should all be fine still. These are what set the range of motion of the rear mech, and prevent it from moving beyond the range of the cassette on either side.
That should be all fine so all you need to worry about is the cable tension being correct so that each shift is nice and smooth. You don't necessarily want the cable to be 'tight', there is a correct tension. I.e. it can be too tight or too loose, so methodical quarter turns on the barrel adjuster is what will get you there.
Here's a video which likely has a decent breakdown of the main things: https://www.youtube.com/watch?v=kVLmpBpC0vU
A marginally more modern example: https://www.youtube.com/watch?v=GQDbr_3di7s
Can't think of any from the 21st century though