Concealing Islam Under Duress and Taking Father’s Support

Assalamu Alaikum wa Rahmatullah, I am a young man in Ontario, Canada who reverted to Islam in December 2024. My father is a Hindu who is extremely hostile toward Islam. He owns a pharmacy which is halal income. Shortly after my conversion I experienced a severe psychotic episode and was hospitalized for one month. I was supposed to start dental school in Australia in January 2025 but had to defer to January 2026 due to the hospitalization. During my time in hospital Allah placed a Muslim patient in my room who taught me Wudu. After discharge my father confiscated my phone and laptop, forced me to work unpaid in his pharmacy for the entirety of 2025, and assigned me a hostile psychiatrist who mocked Islam in our sessions and reported everything to my father. I am now stable on medication with no symptoms for over 6 months alhamdulillah. When January 2026 came and my dental school spot in Australia was available again my father was willing to pay approximately $500k in tuition. However I turned it down because I felt morally conflicted about accepting such a large amount from him while concealing my Islam. I now deeply regret this decision. Even before my conversion during my undergrad he disowned me over a minor argument about when I would write my dental admissions test. He withdrew all tuition money from my bank account and I had to finish my degree entirely on government student loans. He later took me back but the pattern of financial control is clear. I am currently enrolled in a dental hygiene program. To secure my father's financial support for this program I told him that I would not do anything bad, that I would not become Muslim, and that I would not change my mind about Islam in the future. He is paying for part of my tuition and the rest is covered through interest-free government student loans. My long-term goal is to apply to dental school after completing hygiene school which will require significantly more tuition that only my father can realistically provide without me resorting to riba. My Plan: Accept his financial support for dental hygiene and later dental school Conceal my Islam from him to protect myself from financial and psychological harm Practice Islam secretly throughout my studies If asked about my faith continue using tawriyah (ambiguous speech) such as "I won't do anything bad" rather than explicitly uttering kufr or denying Islam After graduating and becoming financially independent pay him back and practice Islam openly My Questions: Is it permissible under ikrah (duress) to accept his tuition money while concealing my Islam given his established pattern of financial abuse and control? I already told him I would not become Muslim and would not change my mind. Does this past statement constitute kufr or is it excused under duress since my heart remained firm in faith throughout? I previously turned down $500k for dental school in Australia because I felt it was wrong to take his money while hiding my faith. Was that the correct Islamic decision or did I allow waswasah to cost me a halal opportunity? Does concealing my faith and using tawriyah in this situation constitute nifaq (hypocrisy) or is it a permissible rukhsah (concession)? Is accepting his money considered deception in a financial transaction or is it permissible parental provision (nafaqah) since my private faith is between me and Allah? I am asking because I suffer from severe waswasah and need scholarly guidance to put my heart at ease. JazakAllah Khair.