Becoming a Christian (following Jesus) is both a decision and a life-long journey. You show the reality of your decision with the rest of your life. Without the decision you won't get started on the journey. So just.....
Make a decision to accept...
that you have offended God, sinned against Him.
that you matter to God and He wants you to know Him.
that Jesus died in your place so that you don't have to be separated from God.
that you will seek to live for God now, with Jesus in charge, relying on His help.
One of the ways to do this is to pray...
You are now a child of God, your Father in heaven wants to hear from you. Prayer is just talking to God, whether out loud or silently. You can use your own words, you can use words from the bible, you can use prayers others have written, the important thing is to talk to God, He loves you and is waiting to hear from you. Just be honest and be yourself.
By all means pray for all sorts of things, but pray especially that you would get to know, love and delight in God - Father, Son (Jesus), and Holy Spirit more and more. God's Holy Spirit inspired the Bible.
The Holy Spirit will never lead you to do something that goes against what the Bible tells you. If that seems to be happening, either you have misunderstood the Bible or you may not be being led by the Spirit.
Exploring, understanding and putting into practice what the Bible says is absolutely essential. Some parts are better places to start than others. Some things are hard to understand, some are hard to do! But over time you will make progress if you keep going.
If the Bible is new to you then starting with one of the New Testament Gospels is usually the best thing to do. As a suggestion - read one of the gospels, maybe Mark to start with. If particular parts grab your attention, then why not write them down - or jot down the references so that you can come back to them.
And Finally...
The church is described in many ways in the Bible, and one of them is 'family', a place where each person belongs. Another one is 'the body of Christ' - where each person has a unique place in the body and a special contribution to make.
“For just as each of us has one body with many members, and these members do not all have the same function, so in Christ we, though many, form one body, and each member belongs to all the others." Romans 12:3-5