I went to Uni at 18 in London for 3 years (Imperial College). Did a Civil Engineering degree, then went to work for John Laing Construction (now Laing O'Rourke) doing setting out of buildings, interpretation of drawings, site surveys, quality control, and site management. Then after 4 years of that I went into the design of buildings and civil works (calculations/computer modeling etc). Seeing how things are built in the real world is the only way to go if you want your designs to be useful... well that's what worked for me anyway! The degree was very theoretical
My starting salary with John Laing in 1985 was £5200 a year + lodging allowance for working on a site distant from home.