Need help getting started

So honestly, i have a game idea that’s too good to be told, in fear that it will be taken and made before i get a chance, let’s just say it’s similar to Dark Souls. Anyway, are there any tutorials or guides someone would mind linking me to, to get started with making an RPG? I plan to make it 3rd person, (Dark Souls). Any help is appreciated, any negative feedback i hope is constructive and not just “you’ll never be able to do it” or “wow don’t post that here theres a thread for it somewhere else” Just tell me what to do.

Let’s get start with a book… maybe?
Or some tutorial videos?

: )