If I knew then what I know now, I would do as follows:
Sit down with The Bible, in the (divinely-inspired) Authorised/ King James Version - and read Only the Fourth Gospel (ie. 'John's Gospel).
Try to read it as if you knew nothing else about Jesus, or Christianity; and read it, study it, live-with-it... under the assumption that it is true and was written by a truthful eye-witness whom Jesus especially loved.
You will (if you are like me!) find it one of the most beautiful prose compositions in the language - and perhaps that will be your overwhelming first impression: keep reading...
It isn't easy to read - but it makes its core points over and over again in different ways, and in different words; so that there is nothing important that is left ambiguous or unclear... so if you don't get it the first or second time, you will catch-on sooner or later.
Then you can go back and check you impressions and conclusions. Read it skimming through quickly, read it in-order; and also read slowly, it out of order: homing-in on parts of special interest.
Read the Fourth Gospel as if it was the only truly authoritative, first-hand source we had about Jesus - because, in a vital sense, it probably is. At any rate, read it as if there was nothing else and you had never heard anything else about what Christianity was, or should be - extract all this from the Fourth Gospel... And see what you make of it.
In other words, if you are thinking of becoming a Christian - extract the essence of what that means, what that is or might potentially be, from the Fourth Gospel. Don't read anything else, don't ask anybody else, don't think about investigating a church... until after you have grasped the nature and teachings of Jesus from the Fourth Gospel.
That is not what I actually did myself; but more than a decade down-the-line that is what I would advise - although probably few would agree with me!