For example will there be bunch riding and a sprint at the end?
No idea. I've never been at the front to find out!
No, it's not a pointless thread. It's a perfectly good question which many on this forum will only be to pleased to offer their perspective on.
And don't be nervous either. There's really no need to be. You can ride as you like; pootle or push yourself. Sportives are a laugh and a buzz. A bit of 'pre-match' excitement is to be expected and part of it all imho. It's why I ride them tbh. Just to take part in something. I'm complete rubbish when it comes to riding quickly, I'll have my moments and do push myself a bit but I'm under no illusions. I'm not pretending to be anyone or anything, I'm just having a laugh.