Well done, Desdemona, for booking holiday alone.
I did that not very long ago. Shortly after my husband died.
I'm naturally shy, but made "friends" on the coach trip, then at the hotel where we all stayed. We were placed by the holiday company on a meal table with either 4 or 6 people. Out of that lot that you meet at meal times, two or three of them are likely to be genuinely friendly and kind people. But not everyone is, though.
Warning .... I made the mistake of answering every personal question that was directed at me during the coach tours (within reason) and at meal times, thinking that was the best way to get to know and connect with people. I was too polite to ask the same nosey questions back. That was foolish of me, because they all said much less about themselves. And once some of these superficially friendly people had dug out my personal circumstances; i.e. being widowed, etc,. and what kind of house I lived in, what my hobbies and interests were and even food preferences, I found myself being judged by some of them - especially those who were there in couples or with best friends, and then sides were taken. This pettiness was uncomfortable and spoilt my holiday a little.
So if you haven't started your lone holiday yet - you can still be frendly, but do keep a little mystery about yourself.
I'm sure you will find a few genuinely friendly people on this holiday if you take care to protect yourself from the kind of intrusion I had - bearing in mind these people are still strangers to you !!
Have a great time!