salut guys i really need help.....

i have a huge tendancy to give up as soon ans one of my stories dont come through so please please tell me if this is a good idear for a story because i really want to finsh one... for once....

okay so ita about this girl called Arianna and she (and its set in a wile il y a befor cars and all that jazz)and she was left par her mother when she was really small and she has lived eith her dad.. who is very secritive and then one jour her dad desides to tell her about her past her mother was a holder to one of the 5 elements she was the holder of earth. she also was the high lords daughter. but when she had Arianna she was taaken of because of that. and well the morning Ariannas dad tell her that she get so upset beacuse it is well a crime to be in hold of magic... and she runs away but comes back and her house is almost destroyed and she farther a inch from his life. and he tells her to go to the fair people and there she will learn how to use her powers but her trip there is going to be reakless... and ya... :) what do toi think?????? ohh ya she has to defete the new dark lord.. (btw i no my spelling is bad)