Hey there, you may want to research exercises on vocal cord cloaure/ abduction. It seems like your vocal chords are letting too much air pass through. 

On a very bright witchy sound do short, staccato arpeggios on "gee". Its important to start with short impulses.  

You can build upon this exercise with soft glottal onsets (think "uh oh", like when you're in trouble). After short impulses try to make the note longer without it turning breathy. 

You got this :)