I did a solo trip a few years ago. I was very nervous about dining alone, but I had to eat lol! My first meal there was lunch at Kona. I brought a Kindle and expected to be able to read while dining there. I didn't have time at that meal, or any other meal in fact. Usually if a server saw me alone, they chatted with me a bit. I also had other diners talk to me. I never initiated the conversations, I am typically very shy. It was nice to talk with everyone! I even met a couple and they asked me if I was on the DIS. I had just recently joined and they told me it's a very useful tool!
I actually enjoyed dining alone. I could leave as soon as I was done, or sit and enjoy the atmosphere (which I did for a long time at BOG). I was hesitant about dining at a buffet alone, so I only did one - Boma. It was very nice and I had no issues at all. I was worried they would clear off my table when I would go to the buffet. They would clear my table of dirty dishes, but left my drink. And that is a restaurant my family would not like at all, so it was nice to try it!