You see folks, word “MMORPG” is red flag in any post, no matter paid or unpaid. It only shows that some people have no idea how much work it is to make such game. And most of potential devs want at least finished project for their commitment. So my advice start with something small that you can finish in a year or so, and let it be no platformer nor mmorpg.
So if you want any unpaid help here, read sticky topic, use template and fill it as much as you can. Explain artstyle of your game, write if its multiplayer mmo, or singleplayer. Give idea about size of project by describing game mechanics. And write what position you cover and what are your skills. And have some pictures as concept art (nice pictures draw attention).