To be a born again Christian is found in the New Testament.
From that time on Jesus began to preach, “Repent, for the kingdom of heaven has come near.”
I have not come to call the righteous, but sinners to repentance.”
For God so loved the world that he gave his one and only Son, that whoever believes in him shall not perish but have eternal life.
They replied, "Believe in the Lord Jesus, and you will be saved--you and your household."
Repent (turn from sin) and believe in Jesus, He will do the rest as you Read and pray and get to know Him more.
See if you can find a version in your native language:
Is English your second language? When I started studying the bible I started with the NLT. As I started understanding it I moved to the NASB. Now I use both. The Holy Spirit is the One who helps us understand, but community (here online is great) helps us as well. If you can get your hands on a study bible, it is also like having a companion in studying, you get their thoughts to understanding as well. Just remember that the notes in a study bible are not inspired. Keep up the good work, you'll get there. Also, please know that we are all ALWAYS learning. No one understands everything. We will have questions that will remain unanswered, but the important things (like the Gospel) are what matters.
Here are a few practical steps:
#1 - Get to know some of the different names of God.
#2 - Read the book of John in one of the easier to understand versions (NIV or NLT)
#3 - Bring your questions to this group, or other Christian groups. Questions are good and healthy. Keep asking.
#4 - pray through every step
#5 - Keep reading. :-)
#6 - study His attributes. https://www.gotquestions.org/attributes-God.html
Through all of this you will get to know Jesus who is Himself GOD. This will bring about more questions as you study the Trinity. Keep in mind, the trinity is ONE God in THREE persons (co-equal and co-eternal). Father, Son, Holy Spirit. https://www.gotquestions.org/Tritheism-Trinity.html
Bless you Ananya. It blesses me so much when people want to learn more about the bible.
Love In Christ, Carla