After you are saved, it's important to get established in foundational grace doctrine in the book of Romans, which is specifically for us today, the church the Body of Christ in the dispensation of grace. The book of Romans establishes the believer. The word established means to be "set; fixed firmly; founded; confirmed." As believers God wants us to be firmly rooted in grace doctrine. The doctrines in Romans that we are to fully know and understand includes:
• Justification
• Eternal Security
• Identification
• Dispensational changes (why God temporarily set aside Israel)
• Service as a Believer
• Authority in the dispensation of grace
• Dealing with weaker brethren by grace
• Glorifying God
• Working in unison with fellow believers
After we are saved, God wants us to know Him, serve Him as sons, and earn rewards for the heavenly places. We are also to study the scriptures rightly divided, which means understanding what scriptures are written specifically to us today (Romans- Philemon) and which scriptures were written to Israel. We read and study the whole Bible, but it's only in the Pauline epistles that are written specifically to us today and the rest of scripture is for our learning.
2 Tim 2:15
Study to shew thyself approved unto God, a workman that needeth not to be ashamed, rightly dividing the word of truth."
Romans 15:4
For whatsoever things were written aforetime were written for our learning, that we through patience and comfort of the scriptures might have hope.
To begin, start by reading the book of Romans several times with a King James Bible. Then, begin to really study out the book of Romans verse by verse. Reading and studying are different. Reading is to help you get familiar with the word and studying helps you to more closely understand it. I also recommend doing a simple 15 minutes a day reading the Bible in a Year program. This will help you to get familiar with the whole word of God.
Romans 1:8-12 KJB
“First, I thank my God through Jesus Christ for you all, that your faith is spoken of throughout the whole world. For God is my witness, whom I serve with my spirit in the gospel of his Son, that without ceasing I make mention of you always in my prayers; Making request, if by any means now at length I might have a prosperous journey by the will of God to come unto you. For I long to see you, that I may impart unto you some spiritual gift, to the end ye may be established; That is, that I may be comforted together with you by the mutual faith both of you and me.”
Romans 1: 8-12 in the King James Bible is the Apostle Paul speaking to the saints (believers) regarding his prayer to God that the believers would be established (which means to make stable/firm) in the sound grace doctrine that is given in his epistles of Romans-Philemon and beginning with the book of Romans. The layout of Romans- Philemon is specifically designed to establish, edify and build up the believer in sound grace doctrine. Romans will give you the foundational teachings of the grace faith; specifically, it will teach you:
• The spiritual condition and depravity of unsaved man (chapter 1).
• The worthlessness of our own self-efforts to try and save ourselves through religious works and human moralism (chapter 2).
• That all have sinned and come short of the glory of God (chapter 3).
• That we are saved by grace through faith alone plus nothing (chapter 3).
• That believers are eternally secure in Christ (chapters 4 and 5).
• Our identity in Christ and how we should not just live after our flesh (chapters 6-8).
• How to yield unto God by walking in the Spirit instead of walking after the flesh (chapters 6-8).
• The dispensational changes and how God is right and just in temporarily setting aside the nation of Israel and their program in order to form the church the Body of Christ today to fill the heavenly places (Chapters 9-11).
• How to be of loving service to others especially towards fellow believers (chapter 12).
• Being good citizens on the earth while we remain here temporarily until the rapture (Chapter 13).
• Dealing with weaker brethren with grace (Chapter 14).
• Living more for others instead of just for yourself – work of the ministry (Chapter 15).
• Warnings to avoid false doctrine and to stick with the preaching of Jesus Christ according to the revelation of the mystery (Chapter 16).
Once we have been firmly established in these doctrines of grace, we can continue to read and study through all of Paul's epistles as well as to study the whole bible rightly divided.
I also have an entire playlist of Romans verse-by-verse Bible Studies available on my Youtube Channel - CLICK HERE for that playlist.