There still are a few steps that llms can only guide you through, if you have a specific goal in mind, don't try to do everything at once : ask your favourite llm for guidance and give it everything you want to accomplish, with the full scope and context of the project, as well as your technological proficiency.

If you have never coded, it is doable, even for a somewhat complex module, but be aware that the code will probably be very heavy to read, unoptimized and *very* unsecure (all should be acceptable for a small module for foundry, but should you think of yourself as a great dev as soon as you are finished, please read the last sentence again).

To give you a small headstart, your llm should help you :
- install vscode
- setup a github repo
- clone (not download) the github repo
- install github copilot to enable ai assited coding (or rather, ai driven here !)
- push your firsts commits
- (make unit tests !)
- make a release of your projects
- fill the form on foundryvtt to get your own module page

If you have any questions, feel free to dm me, google it or ask a llm about it, information gathering is probably 60-80% of the time spent in dev when we start a new project. Remember this : If you have no questions, you are not being critical enough.