Job advise.....please

I am currently an infusion nurse but have always been interested in wound care. I have applied for a weekend position at a local LTAC and have an interview at the end of this week. However I have fairly limited experience in this field (wound vacs, packing etc) and am concerned that I may be getting in over my head. I would welcome feedback from those working in this area as to what my (and my employees) expectations should be. Also, any ideas on pertinent questions I should ask at the interview would be wonderful and gratefully received. Thank you.