My advice to you is be strong and wait until you turn 18
in this time try to learn more about the faith , the catholic faith is so beautiful , and the more you understand the roots of every pray and every practice that we do ,the more you will discover how biblical this church is and you will fall in love with it !
consider me as an older brother , i want you to believe that jesus will take care of you . and he will always be with you and dont worry about whats going to happen to you , he loves you and will take care of your fears.
let me tell you a story happened to me which might make you feel better.
2 months ago my parents visited me here in the US , my mom and dad were shocked and mad at me when they knew that i am Christian and wanting to join the catholic church , they said all what you can imagine about me, they did not respect my choice , nor they wanted to understand why . they just attack me as a person.
they just amused that i was a brain washed cowered who wants to use a religion to be part of THEM(Americans) which is not true at all. they felt very ashamed from me , it was like they discover that i was selling drugs or turning to a gay or something like that !.
and when I response to them and gave them facts that their religion is false , and try to tell them that i studied a lot before making such a choice my dad tried to threatens me , by giving me a last chance to come back to islam , or he will no longer consider me as his son (which means he will not pay my university tuition , that will lead me to go back to saudi arabia)
I told him KEEP DREAMING I will never go back to islam and I found the truth, Jesus is my Lord .
you cant understand emotionally how i was broken from inside , just looking at your own parents who you did not see for a year visiting you and now they are attacking your beliefs and you as a person ,and looking at the dark future that is waiting for me just because of my own beliefs . i was mad at the lord because of what happen to me , its look like i was not trusting him enough . And i was lost in my loneliness .However , days later a group of catholics knew about me and start to pray for me . I went home My mom and dad changed their mind and accepted my choice after a long talk. That was a Miracle
I was sad because I did not trust that the Lord enough , but he himself took care of me .
So dont be afraid my brother in christ, Jesus promise us that people will hate us for his name , Just be strong in christ and he will be with you on your journey to the catholic faith.