I need word in English meaning a person who works on someone (on employer, company and etc)? i.e. contrary to word "self employed", who works on your own.

Which one is wrong? It´s just not worth to get involved ----here i would say - to be involved It´s just not worth getting involved they both sounds quite naturally for me. as a non native )

preparing for the inerview. also saw preparing to the interview. is it correct?

I have graduated on (or) in economics? Also studied on(?) economics programme degree in economics.

What is the difference between outfit and clothing(clothes), dress?

Is it okay to ask "but what?" meaning -why do you ask me something.

"for how long?"- Is this a wrong way of asking "how long for?"

What means "down" here? down at the school, hospital (or nything else)

How would you answer the interview question about stressful situation? Thanks.

Tell the example of how you have resolved the stressful situation?