Hello,
There is a link below to show you the cost, all you have to do is type 'clutch' in the box.
As for the simplicity of a clutch replacement, how experienced are you with cars? Have you ever removed an engine or transmission? Have you ever put one into a vehicle?
Do you understand how to align the pressure plate with the provided tool?
Let me know the answers to these, and at least you have a place to ask all your questions as they come up (just reply to this thread).
Estimator:
https://repairpal.com/estimator/infiniti/i30
RepairPal Certified shops can diagnose and repair your 1997 INFINITI I30. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.