Just go to the interview and do your best. See what happens from there. If you don't make it through that process, well, there's your answer.
I've been in the fitness industry but I too have an interview on Jan 2nd with a highly-reputable Union emergency dispatch company. The pay is fanastic, as is the retirement. The interview is 3 fuckin' hours long.
I'm just gonna go with the flow and let the chips fall where they may. Steady income is great, but if you hate the job... oh well, time to rethink things I suppose.
In the fitness industry I do O.K, but the money is NEVER consistent. NEVER! That is by far the most annoying part of working as a trainer...well... that's not entirely true.
You trainers know exactly WTF I'm talking about ~