To successfully reproduce the rat renal transplant model, there are three basic elements:
1/ the fundamental theory
2/ to observe the application of the theory
3/ practice it on your own
To help you with the self-teaching of the model I have designed this website where you can find the fundamental theory and illustrative images that can be used as a guide.
The secret, however, lies in training. Here is where you will have to concentrate your hard work.
For my part, I can only advise you to not lose heart. It will be hard but not impossible. Try it again and again until you succeed.
Go for it and good luck.