Hi Mark,
Let me just say you have come to the right place to start. There is always someone on the forum who is willing to share their experience. Most of us are scared the first time on our own so you are not alone there. The JUST YOU holidays are very well organised and people on these holidays are all more or less in the same position of wanting to go away but have no one to go with. You always find that no one is left out of anything unless they want to be. I have been on several JY holidays and have met some lovely people some of whom I keep in touch with.
Now all you need to do is choose from the many tempting hols on offer. I can't advise on that as everyone is different in what they want from a holiday. Once you have found one that you like book it. You won't regret it.
Good luck in your search and have a great time.
Angie.