Sharepoint & React class based component function

I’m working on a React class based component and a Sharepoint document library as my database. Currently, I’m stucked with a couple of functions to make the component work properly. One of them should be really simple as I need to take the FileLeafRef from a lookup column pointing at a document library and add it to the function where I’m bringing the rest of the columns from that list. The second function involves adding several states to it in order to render the proper information coming from the Sharepoint list. The issue with this last one is that involves a complex logic behind another function that was not developed in the best possible way. As for the budget, we can talk further to set the best rate or fixed rate for both. Regarding delivery expectations, getting this tasks done as soon as possible is the goal. It’s kind of urgent, so I’ll be available at any time to get don with this. Thank you!