Clutches wear out. It’s one of the facts of life. Although it is not impossible to change your own clutch, it can be extremely time consuming.
The parts are not cheap so you might not even save much money by doing it yourself and you could cause hundreds of pounds worth of damage to your car if you get something wrong. Unless you are 100% confident in what you are doing, it is best to get a professional to change your clutch for you.
Replacing the clutch on your car is by no means the cheapest job to have done, but it doesn’t need to be the most expensive either.