Firstly, welcome to the forum! I hope you have a fun and enriching experience here. You might like to have a look around in the Convert Issues forum as there are many good threads there for those new to the faith and those inquiring into it.
As for books to start with, a popular one is The Orthodox Church
by Bishop Kallistos (Timothy) Ware. It gives a decent history of the church and the basic tenets of the faith. (I found the history a little dry, but it was good to know anyway). Father Ware has another book called The Orthodox Way
which goes more into the beliefs of the Orthodox Church. I found it to be more readable than the first book I mentioned.
Also helpful: For The Life of the World
by Fr. Alexander Schmemann
If you need any help figuring out terminology or abbreviations, feel free to ask! We're here to help.
Let me go check around a bit, but there are some more good books about the Orthodox Church that you'd enjoy.
(Edited to include some more books and correct a title.