High scores on the SAT or ACT.
The reason why it matters is that taking test Fall junior year is fine, but if you’d started Fall 2018 as a junior you’d be a senior Fall 2019 and taking the tests in October would be too late.
What about telling your dad you can get a degree in CS then in medicine in the US? (ok, not really, because you’re not American and American med schools don’t admit internationals, but yes it’s true, you need a 4-year degree to get into a US med school. You can argue that US med schools are better than Bangladeshi med schools, unless it raises his patriotic hackles.) Or you could get a degree in Bioinformatics.
Can you copy what you don’t understand? I’ll try to explain.
All in all, it’d be better if your ‘escape plan’ were presented (marketed) to your father as a “best of both worlds” situation to your father, because without his support you’re unlikely to be able to go.
What about studying in Europe?