The Basics

God not only created all things, and not only made all things good (read perfect), but loves this creation.  God has a special affinity for humans and desires a Father child relationship with us.
There's more to God. Not only is God Father, but is also Son and Holy Spirit.
Three persons in one God.

We are created in God's image and designed to be in a parent child relationship. In that relationship, God loves, provides, and protects us and we are called to trust in that love/provision/protection and given responsibility to care for the rest of creation.

Sin is MUCH more than just the things we do wrong.  In Genesis 3, Adam and Eve were not content with the parent child relationship (see above) and chose to take matters into their own hands.  The children rebelled against the Father, ceasing to be what they were made to be and became distorted images of God. With that, the good creation was tainted and we found ourselves separated from the source of life.  This desire to become our own gods is at the core of all sin/evil.

God comes to us as Son. Jesus Christ is sent do overcome our sin (read rebellion) by trusting God and loving even the most unlovable of us. He loved us so much that, when we rejected him, he forgave us and died for us. Then God raised Jesus from the dead so that we would no longer be separated from Him.

We are brought to belief in this God through the work of the Holy Spirit. In the Holy Spirit we find that we are freed from sin, death, and the power of the devil so that we might live as God first intended us to live.