I don't see how you could try and understand Scripture and not come to some kind of doctrine. It's as if you are trying to just read the Bible without coming to conclusions on anything, which is impossible.
Preaching to the saved and preaching to the unsaved are completely different. A lost person need only come to an understanding of their sin and Christ so that they may be saved, but a born-again Christian has entirely different issues that they need to work through. Really, it's difficult to work through the Bible without coming face-to-face with doctrinal issues. Some books, most of the work is teaching (by the way, for the next few paragraphs please know that I don't mean to overwhelm you).
For example, At least half of the book of Romans is doctrine or teaching: Who has sinned, how they are judged, the state of humanity, justification by faith, freedom from sin, the condemnation of sin through Christ, election, the grafting in of Gentiles, and many other things.
John - Being born again, looking unto Christ, free offer of the Gospel, "no man can come to me unless the Father who sent me draws him," being taught of God, the Scriptures pointing to Christ, sanctification.
Galatians - Justification by faith, the two covenants, preaching another Gospel, the futility of the old covanant, the purpose of the Old Covenant, the ramifications of the promise to Abraham, alienation from Christ in the covanant of works.
1 Corinthians - Divisions in the church, expulsion of immorality, supporting church leaders, marriage, divorce, remarriage, the gifts and their proper uses, the balance of love, approaching the Lord's supper, freedom of conscience, headship in the household and in Christ, ordering worship, the importance of Christ's resurrection, our own resurrection.
Hebrews - The "perfecting" of Christ, rest from dead works, Christ's role as high priest, the futility of Old Testament sacrifices, how the Old Covenant was a mere shadow, the initiation of the New Covenant through the death of Christ, true Sabbath, the finality of Christ's sacrifice, the relation of Christ to Melchizedek.
Ephesians - In the first few chapters you have the issue of election, being dead in sin, being saved by grace through faith.
1 John - Assurance, what a true Christian looks like, the role of abstaining from sin, keeping Christ's commandments, "were they really saved?", antichrist, love for the brothers, the conscience, sin leading to death, fellowship with Christ.
These are things which, if you want to avoid talking about, you simply have to throw out verses of the Bible. They're not things or issues which seem obscurely implied or hidden in the text and may or may not actually be there, but these are all things we look at as being "doctrine," but you can't avoid them without avoiding entire passages.
Be encouraged though; these are things that all make a great difference in the life of the believer. I've found extreme comfort in doctrine and understanding, and have found true application of them to my own life. Most times we look at them as being high ivory tower items that have no bearing in our lives, but trust me, they can make a lot of difference. I had a friend who felt like he had to perform good works to be right before God, but going over the doctrine of the atonement, and the futility of our own works, made a great difference to him.
Trust me, there are a lot of strange teachings out there, some of them simply damaging, others damnable. If you don't have good teachings, you can end up in a dangerous situation spiritually. Trust me, I've wound up in bad situations which were the result of not knowing the Bible that I hope you never go through.
To quote a friend when I told him about some issues I was struggling with, "The problem is that you don't know the Bible."
Bless you bro!
