Is there any certainty or hope that I will?
It's been said that the only certainty in life is death and taxes.
At the end of the day all we can do is pray and trust in God's grace. Certainty is not a luxury that we have in this life, so we are invited to live by faith rather than by sight. Faith in God's promises.
As you spend time in the Scriptures, as you study theology, history, etc. your beliefs, ideas, and thoughts are going to change with time. So even if, say, right now you find yourself going to a church of X particular affiliation, it may not be where you still are later in life.
I believe it better to be, in good conscience, wrong about points of theology and choice of church affiliation, than to insist on being part of something we don't really believe all that strongly in.
That is, it is better to be sincerely mistaken than to live contrary to conviction and conscience. Put your faith in Christ, and even if on every single point we fail, there is still Christ who holds us and keeps us.
I'm not saying that there's no difference between churches, or that those differences don't matter. I believe they really do matter, they matter a lot. But I believe the most important thing for you to hear right now is simply the love of Christ, that through faith you belong to Jesus Christ, because He is the One who has your back. Everything else, including all of our uncertainties and doubts of life, are part of the cross of discipleship we carry as Jesus' disciples. This life isn't the life of perfect anything--perfect knowledge, perfect faithfulness, perfect wisdom, perfect righteousness. All that we have in Christ is what we have received as a gift from God, that rescues us, and we are going to fumble, bounce, roll, and tumble every step of the way. But God has us. That's His promise to us.
-CryptoLutheran