Signing on JSA for the first time today (initial interview), what to expect

I just failed my ESA medical so I'm forcing myself to sign on and see how everything goes really.

I'm a bit worried. Will they take that I've just been on ESA into account when deciding what types of work I can do? I know what I'd struggle with but I'm nervous they'll tell me I should try and do it anyway or something. I'm on low rate DLA, is that enough to be able to see a disability employment advisor?

Lastly, what will happen altogether at the first interview?

Thanks :)