Mm... the story is quite "traditional" (Read: Filled with cliché's, but that's not necessarily bad thing if story is well-written)
-Adding some rts elements into a rpg
...
-It kinda plays like pacman but cooler.
I really want to see how on earth you're going to combine these.
I think you can freely sell games made with Unity(free/indie)
It sounds like you are very new. Your idea is very very very big, especially so for someone so new.
You should learn to crawl before you run.
Totally agreed. Complete a game of your level first. Actually gathering team for a bigger project is a lot easier if you have some stuff under your belt.
Good luck.
P.S.
Oh wait, If you want pro's opinion, hear Paul Eres. (Except he could scare you off completely from indie-scene but still)