First of all, don't tell him many things if he is just starting as he will not understand much.

Try to read the guides.

SeTool2 Lite 1.11 - Top Sony Forums

Flash your phone and How to apply or remove patch using SETool 2 Lite - Top Sony Forums

XS++ 3.1 Guide-Flashing, Customizing, Recovering - Top Sony Forums

USB Flash Driver Installation - Guide - Top Sony Forums

Post an identify log, here is how:

How To Post An Identify Log? - Top Sony Forums