Ever since I was a kid I've rebelled against authority & I love to join all the dots.
I was only 10 years old when I tried to join the dots concerning the book of Revelation.
As I grew older I would buy any conspiracy book I could get my hands on & even joined forums such as 'David Icke' which was wrong as most members on there are far from being Christians.
It was only when I discovered that earth is flat that I truly became a Christian & have read the Bible numerous of times, & the fact that I should be dead right now if God hadn't give me a second chance.
I have truly prayed about my addiction but God has truly laid it on my heart heavy about the shape of the earth.
So... back to basics... it seems like you have been raised in a Church, or at least, religious environment... especially if you have tried to comprehend Revelation at such a young age. I was a teen before I read it and now, 50 years later, I've still not got that book worked out.
The first question then is 'How did you become a Christian'? To elaborate... what was it you did to become a Christian... were you a Christian, of sorts, before you came to believe the Earth was flat... why did that belief caused you to 'truly become a Christian'... how did that differ from how you were before... how did your life change when you became a Christian? Perhaps you could share your testimony. The reason I ask this is to establish that there is, in the first instance, correct relationship with Jesus. Without that then we cannot be certain that what we believe is from God is truly from Him rather than some sort of counterfeit.
As has been mentioned by others here our first priority as Christians is Jesus Christ (which is why we are Christ-ians). We may get caught up in all sorts of other things but we need to constantly come back to Jesus, who He is and how we are to serve Him. The next question, then, would be 'How does belief in a flat earth (rather than a spherical earth) help in us in coming to know God and to become like Jesus?" Ephesians 4:11-13 tells us that the process we, as Christians, go through is to bring us to a unity, teach us about Jesus until we become like Him. God has set in place certain ones to have leadership (Heb 13:7, 17), authority of sorts, so when you say you have rebelled against authority that does create some concern.
It's been many years since I studied the Bible in search of what it says about this world we live in so most of that has sunk back into the recesses of my mind. Perhaps as you read through it you might want to jot down notes to support the idea of a flat or round earth. If it's not specifically stated within the Word of God then it just comes down to man's opinion which can be pretty flaky at times.
There is danger in getting caught up in some ideas...
From American Standard Version:
2Ti 4:3 For the time will come when they will not endure the sound doctrine; but, having itching ears, will heap to themselves teachers after their own lusts;
2Ti 4:4 and will turn away their ears from the truth, and turn aside unto fables.
and from God's Word Version
1Ti 1:3 When I was going to the province of Macedonia, I encouraged you to stay in the city of Ephesus. That way you could order certain people to stop teaching false doctrine
1Ti 1:4 and occupying themselves with myths
(substitute here 'conspiracy theories' - Techo) and endless genealogies. These myths and genealogies
raise a lot of questions rather than promoting God's plan, which centers in faith.
1Ti 1:5 My goal in giving you this order is for love to flow from a pure heart, from a clear conscience, and from a sincere faith.
1Ti 1:6 Some people have left these qualities behind and have turned to useless discussions.
1Ti 1:7 They want to be experts in Moses' Teachings. However, they don't understand what they're talking about or the things about which they speak so confidently.
1Ti 1:8 We know that Moses' Teachings are good if they are used as they were intended to be used.
Such things distract us from what is important for us to address. We need to desire God's will within our life and to receive His empowerment to walk in that path.