I don’t really understand the Trinity or Jesus being the son of God as I believe God wouldn’t need a son since He’s God. But Christianity has some good things so I just want to know more about it before I made a decision on which path to follow.
Welcome. As far as the Trinity, please read a post in my personal blog on the subject, that attempts to give some clarity on what Trinitarians believe. I strongly advise ignoring all analogies given, as they all fail on some level, and since you don’t understand the Trinity, it will only confuse you more, and may even lead to heretical notions on the nature of God that are similar to the Trinity.
onecatholic.wordpress.com/2009/10/14/explaining-the-trinity/
Simply, the Trinity means that there are three distinct Divine Persons (Father, Son, and Holy Spirit) who are of the same “essence” (also called substance, being, divine nature), which makes them one God. These Persons are not merely expressions of someone. They are not manifestations of one Person (meaning, it is wrong to say that they are simply ways that God presents Himself, or “faces/modes” of God). They are not stuck to each other like some sort of three headed person. They really are three, distinct Persons, who are not each other. So, when we say that these three Persons are one God, we mean that they are of the same Divine essence, and share a unity (of will, purpose, intent, love, etc) beyond what we can imagine on this earth.
God (I assume you are talking about the Father) did not “need” a Son. God does not “need” anything. Trinitarians believe that the Father, Son, and Spirit have eternally existed. There was never a time when the Son did not exist. Being “the Son” is Jesus Christ’s eternal relationship with the Father. On the other hand, we believe that when the Son was born on this earth to Mary, He did not have an earthly father. His Father is the Father in Heaven. This is very important: while Jesus Christ did not appear on earth until 2000 years ago, He did exist before that (with no beginning) as the Son.