I suggest you also arrange a visit to an Air Traffic Tower/Enroute facility. This is good prep for the Interveiw, as they tend to ask if you have down this.
I'd suggest you make such a visit, regardless of whether or not you think it will assist your application.
Seriously, if you're applying for an ATC position, knowing what is actually involved in the job should be a prerequisite for your own preparation, & self-determination of your suitability.