There are some things that you really need to keep in mind when you read the Bible. These will help you to avoid mistakes. I hope to write about several of these over time.
Here's one: the Bible wasn't written to you. It was written for you but not to you. The authors of the Bible weren't writing their literary works to you. And those who spoke words in the Bible weren't speaking to you. So, for an example, there's this.
All authority in heaven and on earth has been given to me. Go therefore and make disciples of all nations, baptizing them in the name of the Father and of the Son and of the Holy Spirit, teaching them to observe all that I have commanded you. And behold, I am with you always, to the end of the age. (Matthew 28.18-20)
When Jesus said these words He wasn't speaking to you. He was speaking to the eleven remaining disciples who would become His apostles. And that makes a difference in how you are to understand what He said. Jesus' words continue to apply to us today, but they do so by speaking primarily to the leadership of the Church about the mission of the Church.
Here's another.
For I know the plans I have for you, declares the Lord, plans for welfare and not for evil, to give you a future and a hope. (Jeremiah 29.11)
This is a great and encouraging promise that has much to teach us. But when God spoke it He wasn't speaking directly to every saint ever to live. He was speaking to the exiled Israelites in Babylon. When you remember that, it clarifies how this promise speaks to us today. We, like the original audience, are exiled from our true home, and that stinks for us just as it did for them. But while we are here we can be encouraged by the promise of much good from God as we wait for our restoration to our home, the new heavens and new earth.
Understanding what the Bible has to teach you usually takes more than reading something and taking it as directly meant for you. There are some other steps that you need to take like remembering who the original audience was. And once you do that then you find out how you are, in some way, in the same situation that they were in. And that will affect your understanding of how God's words apply to you.