First step is repentance. And you have begun to repent, by already acknowledging that your life could be better, and you are enslaved to things you know are harmful to you.
How much do you know about Christianity? If you know next to nothing, I recommend reading the 4 gospels (Matthew, Mark, Luke, John) then reading the Living God catechism. It is an Orthodox catechism, but I find that it covers the vast majority of Christendom (I mean that what it says is true for most of Christendom, not simply the Orthodox denomination), and it goes over the events shown in the gospels (Jesus's birth, baptism, transfiguration, teachings, death & resurrection, ascension, second coming, and a last chapter on prayer). I find it is a very good introduction to Christianity in general, although of course you should read other, non-Orthodox material afterward to see how other denominations may differ. (Protestants tend to be strongly against praying to saints for instance)
But the Living God catechism is a bit difficult to get in English (there's no e-book, it's released as 2 volumes too), so maybe someone else can suggest something better.
That being said, you don't read yourself into religion. Go to church, see how the religion is expressed by its faithful, ask the priest/pastor questions if you have any (including book recommendations, maybe).
I don't recommend reading the Bible from front to back before you convert. The scriptures are written by the people of God, testifying to its experience of God, for the sake of the people of God. You may read out of curiosity, but unless you experience the religion, a lot of it may come off as bland or repetitive to you. But maybe we can recommend specific books of the Bible that may interest you, based on, well, your interests. I find that the poetic books in particular (Psalms, Job, Proverbs, Ecclesiastes, Song of Songs, Wisdom, Sirach) can be interesting for inquirers, although they shouldn't be understood apart from the rest of the scriptures of course.