OK, sensible reply now.
As an Infantryman you will not be taught any other "trade" skills, the Army will teach you how to be an Infantryman. If you want Trade skills, you will have to join the relevant Corps. i.e. Engineers for construction, REME for Vehicle maintenance.
Having said that, if you do get in as an Infantryman, you could always try evening classes, but you will need a very sympathetic CoC, which is not likely.