i honestly didn't say what i said to be negative, but as a chef trying to learn something else will be very difficult, cause you have to work enough hours to pay your keep then also try to learn something else that you might not want would be a disaster (OK too strong) for him as it would have been a waste of his valuable time, i mean to be positive in that to decide what trade you have a "feel" for then try to get some experience to try it out first, remember all the effort to change would be his and not to waste it. i'm aplumber to trade then moved into gas and absolutely love it and wouldn't do anything else, all my in laws are in the wet trades and have dodgy backs, knees, and etire early and are skint, plumber or spark, cleaner(ish) and more technical
good luck
good luck