For philosophy foundations, start with Bertrand Russell’s The Problems of Philosophy, which is described as a concise entry point into scepticism, knowledge and philosophical method. Edward Craig’s Philosophy: A Very Short Introduction gives a compact map of core philosophical questions.
For theology, David F. Ford’s Theology: A Very Short Introduction is retained as a balanced introduction, while Augustine’s Confessions connects philosophy and theology through a primary text. The point is not to collect book titles, but to practise moving from summary to argument.
For video and audio, Wireless Philosophy is useful for short animated explanations, The Royal Institute of Philosophy for public lectures and debates, and Closer To Truth for long-form interviews on mind, meaning and religion. Philosophy Bites, The Panpsycast Philosophy Podcast and In Our Time: Philosophy give different levels of discussion and can help you test whether you can explain an argument in your own words.
For structured courses, Coursera’s Philosophy, Science and Religion is directly relevant to philosophical argument, science and religion, Introduction to the Old Testament (Hebrew Bible) supports academic study of religious texts, Philosophy and the Science of Human Nature connects ethics, political philosophy and human nature, and MIT OpenCourseWare’s Problems of Philosophy gives a university-level introduction.