You do not already have the code you need, Grok gave you code that is useless, possibly less than useless. If you want your software to work and be maintainable, you will need to understand what you’re doing. There is no alternative way to develop software than understanding software.

Any software will have bugs and it will be missing essential features. It requires hundreds of rounds of iterations to produce a good software product, if you’re also learning the language you’re using at the same time, the number of iterations you’ll need to do is probably in the thousands.