I have just tried doing this with the FMEL and it works no problem and is very easy to do. Note: the youngest you can make yourself is 14 (the same young age limit on players)Yes. FMRTE will cost you... around 4 Pounds I think...
Good news, you could try an alternative: FM Editor Live 2013 and it's free.
But I do warn you it may harm your game... I don't use it myself so I am not sure how it really works.