LOL the playstation RPG Maker, oh boy those were the days...
That thing was terrible!
Anyways, as you know, making an rpg can be a very time consuming process, and it can be very complicated, depending on how you want the battle system to work, leveling, inventory, ect. I suggest to start with smaller mini rpgs to build yourself up. If you're new to Construct, you'll feel a bit overwhelmed with all the issues you'll come across, not to mention learning a new program trying to make a massive, complex game.
But we're always here to help of course! I wish you luck!