How to Support My Sister as She Embraces Islam

Salam everyone! I'm reaching out because I'm in a bit of a unique situation and could use some guidance. I'll be honest-I don't know much about Islam myself. I grew up in a small, predominantly Christian town here in the Netherlands, and what I heard about Islam from teachers and family was often negative and Islamophobic, so I never had the chance to learn properly. Recently, my younger sister told me she's converted to Islam after reading parts of the Quran. Alhamdulillah, I fully support her decision, but our parents won't. They're very traditional in their Christian views and might even ask her to leave if they find out, which is really worrying. Another challenge is that there's basically no Muslim community or mosque nearby-the closest one is over an hour away. As for me, I'm an atheist, so I'm not deep into religious matters anymore, but I really want to help my sister in whatever way I can. I've tried looking things up online, but I feel advice from real people would be more helpful. Could you share any tips on what I could do for her or get her to support her journey? Jazakum Allahu khayran in advance for your help!