Keep in mind you likely face a 50/50 chance of repairing the display Vs breaking it!
So… If money is tight I wouldn’t even start this project! Also consider your need of the system, lets say you break the display it might take a couple of weeks to get a replacement display assembly!
So what would I do??
I would wait until you have the needed part in your hands so you have a plan-B solution before attempting this. I would also take the time to study this [guide|9493]
Here’s one of the few parts houses that even have it! [https://www.thebookyard.com/product.php?products_id=19975|13” MacBook Pro Lid Rubber Gasket (15) recycled].