Will I be considered a Muslim if I believe in Allah, his messenger, but haven't really adopted it?

I have been living a life of an atheist for long and its difficult to reconcile some of Islam. I plan to first understand what and why, the nuances and then finally follow. Before embracing Islam I am working constantly to get rid of all vices, by following Islam now, I don't want to control these vices but instead I want to get rid of them altogether, so I don't even have a thought for them. Besides I wish to fully understand Qur'an and why what has been said, been said. I wish to be fully clear with the faith and what its teaching. Not just that, I also want to explore other faiths so I can understand, why they are considered adulterated and what it means when Qur'an says they have been adulterated. All this take times and sometimes I do commit sins and I am worried that if I am already a Muslim since I believe in shahdara and that Islam is a religion of God I am acting hypocritical and against the wish of God, where he wants me to be pious and pure. Is my concern legitimate? By the way, I have been able to control vices by 90% and whenever I ask Allah to give me strength and show me the light I get an unexplained strong strength to beat the temptation of committing the sin.