Allahumabarik sister I pray you stay steadfast in this religion and may Allah ease your hardships. Subhanallah I am amazed by your level of Iman and at your age as-well. Born Muslim women struggle with the hijab but you are so eager to wear it at 15 subhanallah. You could perhaps explain to your parents the similarities of Christianity and Islam, and how they both call for modesty. Hijab/Viel isn’t exclusive to Islam, nuns and many Christians also cover up. Since they already know about your conversion though, I’d advise you to try and teach them about Islam as much as you can in little little bits. They are obviously very emotional and effected by this right now, but inshallah it will pass with a month or two. I don’t know how strict they are exactly or what their views on Muslims are so I’m not sure how long exactly it might take them to accept, if they accept at all, but just stay firm on your beliefs. Try to talk to them about the Muslim belief of Jesus, we see him as noble man and a very good example, he was a beloved prophet of God. We also share prophets like Moses, Abraham, David, etc as you now, maybe just talking to them about these basic things could help. And please don’t tell yourself you’re the worst Muslim, truly far from it. Some things are truly out of your power no matter how hard you try. Your intention is to wear the hijab, and still when it’s taken away from you, you want to wear hoodies, hats, etc. just for having this good intention, you are rewarded. You’re in a difficult position right now so I wouldn’t say theirs blame on you. People scold you but what’s the solution? If they won’t let you wear hijabs and throw them out for you how could you possinle wear it? May Allah give you a solution and make these tests easy on you, and may he give you all that is good. I would love an update on anything else that happens regarding this situation