I made an A-RPG in Construct 2. Released a demo and everything.Took me about a year or so of planning it out, with several false starts. I also made a completely different game in order to practice for it.
It's pretty difficult work, requiring extreme planning of many different systems at once. Having any experience with object oriented programming is a must, as well as knowing how to create Construct 2 ready JSON arrays. I'd also highly recommend looking into Spriter for animations.
I decided to practice making a game by creating a platformer from scratch. It was a very very useful learning experience for me. The first game you make may not be the RPG you've always wanted to make, but that's okay. It's best to sharpen your skills first.
That as my plan. Know any good event system tutorials?