This is the same type of customization menu you get when you first start Fallout 76, only Ghoulified. Once you've customized your character's appearance, the quest is complete and you are a Ghoul.

But as you earn XP for pretty much everything you do in Fallout 76, getting up to level 50 isn't that hard. Just keep at it, and in a week or so, you should be exactly where you need to be to ...