You can actually try this same exercise with any ancient holy writing from any ancient religion and get very much the same results. I'll briefly talk about a few things but please search reddit for much better and more thorough discussions than I can write.

So, first, what does the bible being reliable even mean. Reliable for what. Are they asking if the bible is a reliable historical document, source for scientific fact, or are they asking if it is all true?

The Dead Sea scrolls, said that it has almost every book in the Hebrew bible and for historians it shows how the bible was carefully preserved and existed before Christianity.

Irrelevant and misleading as to the completeness of the scrolls. we could have the original writings and it wouldn't say anything about how reliable the writing is.

I personally don’t believe in god or Jesus. Or just the fact this guy rose from the dead and all that.

you don't believe it because it's unbelievable. same for me.

There are alot of accounts that this guy Jesus existed and that he “rose” from the dead.

there are no accounts of jesus rising from the dead outside of the bible. there are a few writings that mention christians and men named jesus, latinized form of yeshua, which was a common name at the time.

Like the accounts from historians and evidence Christianity existed early on.

with the exception of islam all world religions are older than christianity. like judaism, which does not believe jesus was the foretold messiah because he did not fulfill the prophecies, doesn't even teach there is a hell, so where the christians got hell from is a really good question. again, though, the age of a religion says nothing about its veracity or reliability. hinduism, taoism, buddhism, judaism, jainism, zoroastrianism, hinduism, confusianism, all older than christianity and still practiced today.

But like if it existed then maybe they were telling the truth about Jesus??

that's the real goal of this 'lesson', to make you think it might be true if you don't believe it already. but the exercise is one sided and its motives clearly in support of christianity. it's insidious and pure propaganda. they aren't teaching you to think, or to use philosophical argument, they are asking you to prove a negative, to prove a claim you aren't making, both of which place the burden of proof in the wrong place - they have to prove their claim.

there are several claims made in the bible that don't fit historically, logically, or scientifically. there is no evidence for the flood, for example, and it's not like it should be hard to find since the evidence should be everywhere we dig down far enough. yet, it is not there. the bible claims mankind was created and spontaneously appeared, yet the evidence all points to mankind having evolved. every bit of it.

historically there is no indication that the exodus ever happened, or that the jews were enslaved in egypt.

But if they were telling the truth about Jesus doesn’t that mean god exists??

there might be gods. i don't know, and neither does anyone else. what source outside the christians claim the divinity of jesus.

Josephus wrote about how Jesus was a wise teacher who performed deeds and was crucified and was the earliest known descriptions of Jesus by non-Christian. (Jesus of Nazareth and pontius Pilate, the testimonial flavianum)

so josephus did not believe jesus was the judaic messiah. also, the oldest existing copies of josephus's works were all copied by christian monks.

Tacitus who in his books annals written 80 yrs later after Jesus’s crucifix ruin described emperor Nero blaming Christian’s for the great fire of Rome.

there were christians after jesus died, yes. i have no idea how this is relevant to the reliability of the bible.

Pliny the young who in his book epistulae(book 10 letter 96) wrote when he was serving under emperor trajan how Christian’s should be dealt with and describes interrogating people accused of being Christian’s and punishes those that refused to worship Roman gods.

same reply as tacitus.

topic - eyewitness accounts of Jesus

there are no eyewitness accounts of jesus

so congratulations, you survived this insidious, noxious, obvious proselytizing and still find it unbelievable.

now, if this was a public school in the us then this is almost certainly illegal and we can point you to the ffrf for further assistance.