You could always take a look into RPG Maker XV. I got it pretty cheap at a Humble Bundle sale, and the Steam Winter Sale is bound to start soon There are a few successful commercial games made with it, "To the Moon" being a good example. If you're a complete beginner, it may be helpful to start with a tool that allows you to focus on making a game, which RPG Maker does. It comes with a few basic assets (Map tiles, character sprites, music, etc) with which you could build an entire game if you wanted.
I'd suggest you download the free Lite version and see if it would fit your project, and play around with it. Since you wnat to make an RPG, maybe it's not necessary that you reinvent the wheel (programming-wise) when there are already engines that can do the heavy lifting for you.