Is this a suitable event to run my first half marathon or is it a competitive event and not for fun runners?
do you mean first race? goining by your weekly mieage and favourite distance it is perfect.
sorry i thought you were asking about the distance not the event.
I can run the distance but never have in a race environment. I would consider my self slow and would not want to be in a event where everyone would be quick and competitive and I would be a long way behind everyone.
You can see last years results online. Have a look at them and if you've got an idea of what time you will manage, you'll see where you would fit in....
uk.trumin.com/.../result.ctrl