Have you considered RPG Maker? I haven't tried it myself, but it looks like you don't need programming to make a game with it as long as you are not trying to deviate from a standard JRPG, and the art style is kind of uniform so you shouldn't have much trouble finding tilesets that fit together. That leaves just the map building and the story - which, from what you describe, are things you should be able to do yourself.
You will need to learn JavaScript if you want to implement your own gameplay mechanics in it though.