i want to make game like Rune Factory or similar to that of Harvest Moon. But I'm not sure where to start
please share your idea
It's far to generic a question.
How much experience do you have with C2?
Have you read the manual? Completed any of the Tutorials? Searched the forum?
There are many, many threads dealing with the basic RPG elements.
Once you have the basics, you should be able to ask more specific questions.