Hi, I'm a Christian. Help Me Disprove My Religion!

[Aractus]

Out of the 27 books of the NT, only 7 can be attributed to the alleged author... and this author was not present at the time of Jesus.

There is no doubt that Paul wrote Galatians, 1-2 Corinthians, Romans, Ephesians, 1 Thessalonians, and Philemon. He isn't an "alleged author" he is "the" author of those works without doubt.

James and Judas were brothers of Jesus and therefore they were present at the time. They were not however followers of Jesus while he was alive.

From what I gather (and this comes mainly from reading Ehrman and the wiki) none of the books is written in the first person

Incorrect. Acts 13-28 is in the first-person. All the epistles - Paul's, the pseudo-pauline ones, Hebrews, James, Jude, 1,2,3, John, and 1,2 Peter are all written in the first-person.

and none has an accompanying "written by so-so".

Incorrect, Paul claims authorship for all of his epistles. James, Jude, and Peter claim authorship for their epistles (note some are disputed). "John" claims authorship of Revelation.

The wikipedia articles you quoted contain numerous errors:

"The neutrality of this article is disputed. Relevant discussion may be found on the talk page. Please do not remove this message until the dispute is resolved."

"Most scholars believe the Gospel of Matthew was composed between 80 and 90 CE, with a range of possibility between 70 to 110 CE."

That sentence is nonsensical.

Have a look at the cited bibliographies - well over half of the material is out of date, and much of it isn't of any academic value.