It’s quite something to study religion for 5 years... I hope you at least did a comparative religion course. Although many of the ideas of god in Abrahamic religions are very flawed, there are things to be learned from other religious directions.

I suspect you mean astronomy, not astrology.

The greatest thing about freedom of thought is you don't have to define yourself in terms of what you're against or don't believe in. Enjoy your life as you see fit. I think of myself as a husband, father, stepfather, grandfather, software developer, and writer, way before I think of myself as an atheist. In fact I prefer to identify more as a critical thinker than atheist. My atheism (and yours) is just one side effect of critical thinking.

You've come a long way. Congratulations. My best to you.

On Google, I looked up "atheist groups in Paris, France." Here is a list of 69 atheist organizations in Paris.

[stason.org]