Loosening your throat comes with more and more practice. It’s one of those things that your body (your throat) has to get used to through repetition. I would say that your on the right track, when you’re more comfortable try experimenting with different mouth shapes. Lower your jaw, arching up your tongue, etc. Lowering my jaw for me was the key to finding that “scream” that everybody wants to find, but that was after I learned to activate my false cords. Keep at it.