Hope this helps, brother.
The Book of Enoch is not Scripture. As such, the Holy Spirit did not lead the church to include it in the canon of Scripture. It’s full of false doctrine, doctrine that doesn’t square with the established canon.
This is one example, but there are many:
10:2 Enoch allegedly wrote about Noah, even though the Bible teaches that Enoch was taken up to heaven years before Noah was born.
And here we should take Paul’s advice:
As I urged you upon my departure for Macedonia, remain on at Ephesus so that you may instruct certain men not to teach strange doctrines, nor to pay attention to myths and endless genealogies, which give rise to mere speculation rather than furthering the administration of God which is by faith. But the goal of our instruction is love from a pure heart and a good conscience and a sincere faith. For some men, straying from these things, have turned aside to fruitless discussion, wanting to be teachers of the Law, even though they do not understand either what they are saying or the matters about which they make confident assertions.
Timothy 1:3-7
Under the heading of canonicity, it is not enough to merely demonstrate that something is quoted. Instead, it is necessary to demonstrate the nature of the quotation. While Jude may have quoted from the Book of Enoch, the Book of Enoch that we have today is believed to be a far more recent invention (the older parts being from 300BC) long, long, long after Moses, let alone long after the late pre-Flood period. And the more recent parts of the Book of Enoch are believed to be from 1[SUP]st[/SUP] century BC (some of the text includes anachronistic details that lend credence to this theory of a much later authorship). In conclusion, at best, the Book of Enoch is Jewish Midrash, at worst it’s a culturally important piece of biblical fiction.
More examples of false doctrines in the Book of Enoch can be found at the excellent link below.
canon - Why is the Book of Enoch not regarded as canonical? - Christianity Stack Exchange