shipping integration into stan.store

I am looking for someone to integrate USPS shipping into my store, Stan.Store. Hoping to have this completed no later than Saturday October 28th as it is a quick job. I need the integration to include real-time shipping rates and tracking functionality. My goal is to be able to provide reliable shipping options to my customers (where their shipping costs are added to the total price), while having visibility into where shipments are along their journeys. With this functionality, I hope to create an enhanced customer experience, in which customers are able to make informed decisions regarding their purchase. If you have experience with shipping integrations, please reach out and let me know how you can help. The code has already been created by CHATGPT and the USPS account with API information has already been gathered. Here is the stan.store page: https://stan.store/mrspreadlove1/p/open-up-preorder