I would say this forum or any online forum is a lousy choice to learn. You will be bombarded with conflicting answers from Baptists, Presbyterians, Pentecostals, Roman Catholics, end time rapture nuts, Amillennialists, premillennialists, postmillennialists and hundreds more.
You were advised to start in the book of John. That will tell you about Jesus. But what about Him? Why do we need Him? Maybe you need to start at the beginning and learn about creation and Adam's fall and the resulting "futility"
Romans_8:20 For the creation was subjected to futility, not willingly, but because of Him who subjected it in hope
You need to understand the Bible's intent to tell a story about God and his acts in history for humanity’s salvation.
Sure you need to learn about the Savior, but also why we need a Savior, and why this particular Savior.
Being on these forums is cool but you won't learn anything. If you were serious about Christianity you would find a good Church and talk to real people.