Okay MashaAllah.
Just read throughly and if you don't understand anything then please ask again. It is important to read Quran correctly and rectify yourself as soon as you fear that you're or you might be going wrong.
Well, just ask for forgiveness because you did not know, inshaAllah azzawajal, Allah Azzawajal will forgive you since you did not do it intentionally and you won't need to offer them again.
I hope that helps.
Allah Azzawajal knows the best.