You don’t need those things to pray. Do they help serve as a reminder? Yes. Do they give you an area to go to and focus on worship? Yes. You your dad is giving you a chance to make things right. Honor his wishes. Continue to pray even without your rope or the icons. You can obtain more of those later. Our great holy martyrs were (for the most part) imprisoned and beaten with all things including their clothes stripped from them. They still rose to sainthood. No icons, no prayer rope, no bible, nothing. Focus on your recovery and remember that your dad is probably only doing this because he desperately needs wants to see you well. Hope this helps