@Joeljjohnson Welcome! I think I would point out that not all doctrine is equally important - sincere believers in Christ can disagree about the rapture or the exact nature of the final judgment and still be devoted followers of Christ.
Not all doctrine is equally important. Some beliefs are at the very center of our Christian faith and to deny them is to deny Christ. Other beliefs are important to how we practice our faith and are therefore the cause of disagreement between many denominations, but these beliefs do not place us outside of Christ. Still other doctrines, such as eschatology, are difficult even for very learned and godly people to understand clearly and are therefore a matter of opinion.
The below article offers a fuller explanation of levels of doctrine and gives a helpful summary list of 4 levels of doctrine.
absolutes define the core beliefs of the Christian faith;
convictions , while not core beliefs, may have significant impact on the health and effectiveness of the church;
opinions are less-clear issues that generally are not worth dividing over; and
questions are currently unsettled issues.
Where an issue falls within these categories should be determined by weighing the cumulative force of at least seven considerations:
- biblical clarity;
- relevance to the character of God;
- relevance to the essence of the gospel;
- biblical frequency and significance (how often in Scripture it is taught, and what weight Scripture places upon it);
- effect on other doctrines;
- consensus among Christians (past and present); and
- effect on personal and church life.