Advice / pointers on replacing valve seal

This weekend (hopefully) I'm going to attempt changing valve seals (cylinder 3 only, engine in car assembled) on my 440. I've never done anything & had a few questions I was hoping members with experience would be able to help out with:

How many psi should i set compressor at to fill cylinder?

Does the cylinder have to be TDC? If so can I just bar the motor over until I see the rocker raise and just start to come down?

What is the torque spec for the rocker assembly when I put them back on?

Can I just use a valve seal install tool to push the seal on the valve stem ? Will it damage the seal again or do I need like a straw / tube

Any additional advice / tips / tricks would greatly appreciated & sorry in advance for the academic questions. I would like to learn & tackle this myself rather than just paying to have it done