Elements of a set-up aren’t really independent. Everything works in unison. If you adjust the truss rod, then the saddle may need adjustment as well…
Setups aren’t that difficult, and it’s a good thing to help you understand your instrument.
Check out this thread for a plethora of setup information:
You absolutely don’t need to watch them all - they’re all giving basically the same info, just in their own style. Start with the always trust-worthy Josh’s video and go from there…