Even though it is very much possible to build an adequate 16-bit type jRPG with Construct, you sound like the type of guy who would benefit more with a tool such as RPG Maker. It would at least fill your first two requirements.
As for the third, most people start out thinking they need exterior help and motivation, but the truth is at the end of the day, it's your own project and your own ambitions, and nobody will come and do the dirty work for you. Forums such as this one are good for instant feedback, though. It can often bring a boost of motivation if other members like your work.
Good luck with your project, and don't give up on it if you feel it's worth it.