I had exactly the same problem. Recently, with the help of ChatGPT (just free version). When I didnt know anything, I just asked. The result was pretty good.

I also wrote stupid code first in my own version, and copied + pasted to chatGPT, asked it to improve it, or rewrite in ruby on rails style. And wow!! The rewrote version even went with explanation.

Beside that, you can use Rails console to test.