The clan that conquered the Vault of Glass first was a group by the name of 'PrimeGuard,' made up of 3 Titans, 2 Hunters, and 1 Warlock. This team of six - after a lengthy session that lasted 10 hours, 42 minutes and 3 seconds - finally succeeded in completing the game's first raid ever. Of course, the team provided photographic evidence, confirming their achievement. Bungie later acknowledged the feat on its own Twitter account before putting forth the challenge to try it again on the Hard difficulty.
DestinyDB shared some interesting stats regarding PrimeGuard's run, including the tidbit that PrimeGuard died a combined total of 1,606 times, with the average lifespan of a player lasting only 2 minutes and 22 seconds. If you're curious to know what levels the players were, the lowest level was 26, while the highest was level 28. Perhaps you should begin rethinking your idea to challenge the raid as soon as it's accessible?
There's no need to rush through the level-grinding process to attempt the Vault of Glass, though. Bungie reassures Destiny players that the raid isn't a timed event and you can tackle it when you're ready. That said, your progress will only be saved for a week, meaning that you should probably try to finish it soon after beginning. Restarting a raid that apparently takes a minimum of 10 hours to finish sounds less than ideal.
The Vault of Glass is only the first of several events Bungie has planned for Destiny this month, so expect more opportunities to grind levels and hunt for new gear. Until then, you'll need to keep shooting away at what's available to you, for which we have a convenient write up that explains what to do post-level 20 and how to increase your Light level using Strange Coins, Motes of light and Vanguard/Crucible Marks.
How prepared are you and your Guardian for the Vault of Glass? Or is this particular mission something you're going to hold off on until you've dug into everything else Destiny has to offer? 10 hours is certainly a large commitment to make to a game that doesn't allow for pausing.