Post flood names of Mt. Sinai when the flood's destruction had ceased:

Mt. Sinai
Mt. Horeb
Mt. Musa (Mountain of Moses)

Moses was born nearly 1,000 years after Enoch

Enoch 1:4
And the eternal God will tread upon the earth, even on Mount Sinai,
⌈And appear from His camp⌉
And appear in the strength of His might from the heaven of heavens.

Deuteronomy 3:8-9 KJV
...the land that was on this side Jordan, from the river of Arnon unto mount Hermon;
(Which Hermon the Sidonians call Sirion; and the Amorites call it Shenir;)

Judges 3:3 KJV
Namely, five lords of the Philistines, and all the Canaanites, and the Sidonians, and the Hivites that dwelt in mount Lebanon, from mount Baalhermon unto the entering in of Hamath.

1 Chronicles 5:23 KJV
And the children of the half tribe of Manasseh dwelt in the land: they increased from Bashan unto Baalhermon and Senir, and unto mount Hermon.

Those who don't put on righteousness by faith in Christ NEVER receive heavenly mansions

1 Corinthians 6:9 KJV
Know ye not that the unrighteous shall not inherit the kingdom of God?
Revelation 21:27 KJV
And there shall in no wise enter into it any thing that defileth, neither whatsoever worketh abomination, or maketh a lie: but they which are written in the Lamb's book of life.

John 14:2-3 KJV
In my Father's house are many mansions: if it were not so, I would have told you. I go to prepare a place for you.
And if I go and prepare a place for you, I will come again, and receive you unto myself; that where I am, there ye may be also.

Source

Genesis 6:14-16 KJV
"Make THEE an ark of gopher wood; rooms shalt THOU make in the ark, and shalt pitch it within and without with pitch.
And this is the fashion which THOU shalt make it of...
A window shalt THOU make to the ark, and in a cubit shalt THOU finish it above; and the door of the ark shalt THOU set in the side thereof; with lower, second, and third stories shalt THOU make it."

Genesis 6:22 KJV
Thus did Noah; according to all that God commanded him, so did he.

Hebrews 11:7 KJV
By faith Noah, being warned of God of things not seen as yet, moved with fear, prepared an ark to the saving of his house; by the which he condemned the world, and became heir of the righteousness which is by faith.

Source

Revelation 20:13-15 KJV
And the sea gave up the dead which were in it; and death and hell delivered up the dead which were in them: and they were judged every man according to their works.
And death and hell were cast into the lake of fire. This is the second death.
And whosoever was not found written in the book of life was cast into the lake of fire.

Source

Internal Contradiction

Leaders of the alleged angelic rebellion
name discrepancies and misnumbering:

Enoch 69:2 Enoch 6:7

1. Samjâzâ                1. Sêmîazâz
2. Artâqîfâ                 2. Arâkîba
3. Armên                   3. Râmêêl
4. Kôkabêl                 4. Kôkabîêl
5. Tûrâêl                    5. Tâmîêl
6. Rûmjâl                   6. Râmîêl
7. Dânjâl                    7. Dânêl
8. Nêqâêl                   8. Êzêqêêl
9. Barâqêl                  9. Barâqîjâl
10. Azâzêl                 10. Asâêl
11. Armârôs             11. Armârôs
12. Batarjâl               12. Batârêl
13. Busasêjal            13. Anânêl
14. Hanânêl              14. Zaqîêl
15. Tûrêl                    15. Samsâpêêl
16. Sîmâpêsîêl          16. Satarêl
17. Jetrêl                    17. Tûrêl
18. Tûmâêl                18. Jômjâêl
19. Tûrêl                     19. Sariêl
20. Rumâêl
21. Azâzêl

Sacred-Texts

The Book of Enoch: Book of Noah--a Fragment: Chapter LXIX

The Book of Enoch, by R.H. Charles, [1917], full text etext at sacred-texts.com

Enoch went to the land of Dan?

How? Laish wasn't renamed "Dan" until far after the flood after the birth of the children of Israel

Judges 18:29 KJV
And they called the name of the city Dan, after the name of Dan their father, who was born unto Israel: howbeit the name of the city was Laish at the first.