When my proposed site gets published, Will i be head moderator of the site per being the one who proposed it? Or does proposing just basically give free ideas to the site developers to make a site? What im asking is would i be in charge of the actuall Q/A site that I proposed?
No. ♦ moderators used to be appointed by Stack Exchange staff, chosen from subject matter experts and users already familiar with moderation tasks on other Stack Exchange sites. Nowadays, they often hold elections, just like on main sites. See this recent example.