Hey Deuzius,
You can find more information about the criteria for the name reservation for WoW Forever on the store page itself:
https://shop.battle.net/product/world-of-warcraft-forever
How do I access WoW: Forever?
- Your WoW subscription or game time grants you access to WoW: Forever starting November 4.
- Upgrade to unlock the new Skyborne race along with their starting experience, Beta access, Early Name Reservation for your first adventures, in-game cosmetics, and more!
You can then see which version provides which benefit in the table if you scroll down the page, as well as the little (1) note on the side of the page.