I prefer to stay on Disney property for solo trips for that extra peace of mind, too. I rely on Disney’s transportation to/from the airport and from resort to the parks and have never felt unsafe or isolated during a trip.
For those of you feeling anxious about going solo or worried about being lonely - I felt the same way before my first solo trip. But just go!!! You will have an absolute blast doing what you want to do when you want to do it. Most people visiting are in a good mood because they are on vacation and will be happy to chat you up if you give them an opening. And no one else will really know you are on a solo trip unless you tell them. It’s actually pretty common to see parties of one walking around, even if they travelled with a larger group.
And do not forget the single rider benefit! There are dedicated single rider lines for test track, expedition Everest, and rock’n’roller coaster. I’ve also gotten lucky on soarin’, 7DMT and FOP and been pulled from further back in the line to fill an empty seat. So less waiting!