Access The Moon To Do The Next Step Of The Lie

If you begin the story with your original character, this skips the customization options and goes into into the game.

However, if you do choose to import a character, the game won’t give you the option to customize their appearance.

I had the same struggle when I started Destiny 2, but unfortunately the only way to change the appearance of the characters that were synced from Destiny is to delete it and start from scratch.

there’s no way to edit your appearance once the game starts. This means that once you leave the Destiny 2’s starting screen and customization options, you’re stuck with that look for the rest of the game. If you’re unhappy with your original character’s appearance, it’s best to create a new character from scratch. And if you’re creating a new one, make sure you’re happy with the way they look before moving forward.

Source

According to this reddit post, it can be found from blind well completions. Any level should do, though most anecdotal evidence shows level II might give the best chance for the emblem (though this has not been confirmed by Bungie).

This reddit post also notes that you can get it from ascendant trial chests, though the drop rate is very low.

You will also be granted the base emblem if you manage to get one of the variants by either:

1. Completing all of the ascendant trial time trials or
2. Getting a very rare drop from the heroic blind well bosses