Hola Angie!
You had many things right, not just the accent!!
I must tell you you're right about writing the sentence several times, as repetition is a good way to learn, yes, sounds a bit "strange" but, when learning a language is quite helpful.
In few words, I can tell you this:
Mi is always followed by a noun: Mi amiga, mi casa, mi perro. (My friend, my house, my dog).
On the other hand we have mia:
Esta casa es m�a. (m�a = mine) As you can see, there is no noun after "m�a".
Hope this helps!
Well, as you said, I got the accent right <G>
I'm dense about the mia and mi and the e and y - something to work on. I'll have to write the sentence a dozen times to practice (like I did as a child in school when you misspelled a word).