Hey brother,
I'll be honest with you, our Sovereign God has permitted a vast amount of divisions among the earthly churches to serve His purposes. If we deny that this is the case, or deem a denomination (or non-denom) incapable of harboring truly converted Christian believers, then we are questioning God's providential work in raising up these groups for the furtherance of His mission in this fallen world. He may use the uniqueness among the many to reach a multitude of different people.
First and foremost, we are brothers and sisters united in Christ. As it was written, "That which we have seen and heard we proclaim also to you, so that you too may have fellowship with us; and indeed our fellowship is with the Father and with His Son Jesus Christ" (1 John 1:3). Jude had said also that what unites us is our faith in "our common salvation...the faith that was once for all delivered to the saints" (Jude 1:3). Because of this we should do well to foster a spirit of "love for all the saints" as Paul says (Ephesians 1:15 and Colossians 1:4). Rather than see each other for our minor (sometimes major) doctrinal differences, we ought to see each other for those whom Christ died.
Once you figure out which denomination is in line with your understanding, get to a church immediately. God uses the church to grow us in our spiritual life and uses it to sustain us as we walk with Christ. Understand that the majority of churches hold to the core teachings that are vital to understand, yet none of which is necessary for God to bring about your salvation, for we have it in Christ! Find a group of folks you can grow with, who share your love of Christ, and can stand to be around for great fellowship as you are worked upon by the sanctifying grace of our eternal God.
"Let no one boast in men. For all things are yours, whether Paul or Apollos or Cephas or the world or life or death or the present or the future - all are yours, and you are Christ's, and Christ is God's" (1 Corinthians 3:21-23).
God bless!