Hi, I’m not going to let my personal religion / beliefs influence this in any way, but I will express beliefs that are not about different religions, just opinions in general. If you completely and passionately disagree, I’ll never know unless you tell me, so don’t stir up a hate debate and cause a big argument please.
I think you should tell your family about your beliefs and try to persuade them if you want. If they don’t agree with you, let it be. My thinking is that, if there is a God (don’t come at me for that), they will appreciate everyone’s beliefs about them and let them worship them in the way they feel most comfortable. You should accept that if they don’t wish to follow your religion, there is nothing you can do about it, and to force them to follow your religion would be as deeply unethical to your faith (I guess Christians would call it Sin) as them refusing to follow it in the first place. You can’t tell people what to believe so I guess the right thing to do is just leave it and in time they will figure out their own faith.
Hope this helps :)