I admire a man who takes a challenge!
See if you can find a Haynes workshop manual or similar.
I wouldn't hold my breath on getting the original Renault books as these have been replaced by pdf files only available to Renault employees. The manual will show you what to remove from the car and how.
Try to identify the partnumbers for the parts you need.
Usually the partnumber is found on the part itself. If not pm me the vehicle number and I will try to dig up partnumbers for you.
See if specialised tools are needed.
Borrow what you can. Buying these special tools can be costly. Only buy tools if there is no other way or if you plan to use them for future work on the car.
Now you will have to decide whether you want to install new parts which will give you optimum performance and longevity or go to a breakers yard and pick up used parts of which you will have no guarantee how long they will hold out until failure.
If you are selling the car within the next 12 months you can opt for used parts.
If you are going to be driving your car for the next 3-15 years I would prefer to go for new. Doing this job yourself does save labour costs which usually makes up the lions share of the repair bill which allows you to spend more on the price of the parts.
New parts come in 2 flavours: Original Renault or aftermarket.
The first will be more expensive but it is without doubt the part you seek. They usually come with a kit of small parts like gaskets and seals if needed.
With the second you will have to bring the old parts to visually verify you are getting the exact same item but often it will cost less than original manufacturer.
Good luck!