[ZK] As it happens, both spellings are acceptable :-) As for the employment - are you seeking permanent full-time or temporary full-time or perhaps part-time, or just holiday work or support-yourself-through-your-studies work; days, evenings, nights, weekends or all four? C'mon gal, we need details!
"Hamster" is the correct spelling for the animal, yes. "Hampster" is a misspelling that caught on rather well and is therefore the de facto standard here ;-)
But if "Zooological Keeper" is from a radio programme, why the extra "o"? This story doesn't add up, inspector. As for jobs, assuming this is something part-time now, I think it makes sense to think about what you want to do later in life and try to work towards it. However, I am the last person anyone should seek career advice from.