I did a solo WDW trip in 2012 and had a great time - you'll honestly be fine! I was supposed to go with an ex boyfriend but we broke up a week before, so I just went without him (it was too late to cancel and get our money back) I think I had a better time than if I'd actually gone with him
I think a lot of the WDW vloggers treat their trips more as a chore than an actual holiday because they're in a state of delusion where they think going to Orlando is their job and therefore have to go 20 times a year