what jobs get cheapest insurance

right I'm an apprentice mechanic ,insuring a 1.3 polo cl 1994 , got £1900 atm , want abit lower if i can I'm 18 , not been driving long ,

found a mechanic was more expensive , then a fitter was too , and an motor mechanic ect ,

then tried mechanical technician came out well cheaper , for eg if i was a student i would be insuring this for £1100 third party ,

a mechanical technician was cheapest fully comp at £1900 ,

anything cheaper anyone know along my lines of work ,

work for a rolls royce , aston martin , jaguat and bentley specialist in henley on thames , (hoffmans of henley ) , apprentice

help appreciate cheers , (Y)

scott