I would suggest understanding the meaning of certain verses online,
If you are looking for an alternative to Christianity I would suggest C.S. Lewis "Mere Christianity" and other books on Christianity as they are very good.
If you want a basic idea of Christianity you could watch the movie "Son Of God", It's a very nice and a bit informative movie though not 100% correct, but it could rile up your interest.
Nothing can beat reading the bible and you should make a schedule to read at least one passage of it everyday, You could finish John in i guess 21 days.
You should start with the new testament first in this order
john
matthew
mark
luke
philippians
ephesians
colossians
romans
genesis
psalms