PCB Design Modifications in KiCAD

I have an existing PCB design created in KiCAD that needs some modifications to both the schematics and the layout.

Modifications Include:
- Adding new components
- Changing existing connections
- Removing components

Layout Changes Include:
- Re-routing traces
- Adjusting component placement

The modifications primarily involve:
- Resistors and capacitors
- FETs

Ideal Skills and Experience:
- Proficiency in PCB design using KiCAD
- Experience with modifying schematics and layouts
- Knowledge of working with resistors, capacitors, and FETs

Just make sure not to change anything on the PCB geometry, that has been finalized already, just need a few parts changed.