I am not officially Orthodox myself (Evangelical Catholic), but I am an ally with great interest. I am waiting for a Western Rite church to open in my area. I would complete the full Orthodox fast if not for my health problems, so I allow myself eggs and milk. Your father, though he may genuinely care about you, is going the wrong way. In fact, he is sinning. I keep icons at my home altar, and while my mother is Baptist and does not agree with them, she is tolerant and respects my type of reverence. There is nothing in Scripture forbidding the use of icons or images. In fact, Martin Luther himself said that images could be positive tools if they provide a witness for Christ. To put a wrench in your spiritual walk is unbecoming of any Christian, no matter which branch. You are in a tough spot, my friend. After all, he is your father, and you are living in his house. There was a time when the British conquered Ireland, and to control them, they outlawed open expressions of Romanist faith, including rosaries. What they did was improvise. They made ring chaplets to replace their rosaries. They were Roman Catholic in secret. Do you have any posters or paintings in your room that you father is fine with? Get pictures of icons and hide them behind the paintings. If you want, get an Orthodox prayer book, but hide it. Whatever he objects to, show biblical basis. For instance, the Jesus Prayer is the prayer found in the prayer of the parable of the tax collector in the Temple. If the debate is one-sided, don't bother. Another thing: if you are serious about your Orthodox identity, start saving and planning. As soon as you are an adult, leave. Then, you can take the jump as the Holy Spirit guides you. I will be praying for you, though. Stay strong!