I'm a mechanical engineer now working in construction. Been in this field ~7 years or so and I ended up in this field more-so out of opportunity than desire. I don't particularly care the work but like everyone else says, the pay is pretty decent. I'd honestly rather be doing graphic design or something creative (I used to work part time as a barber) but I guess I want the stability. Not to say there aren't mechanical fields where you can't be creative, it's just more difficult to find those opportunities.
But if anybody knows any good mechanical opportunites, holla at ya guala.
Also cosign what other members said, a lot of the processes are already laid out, you just gotta not muck them up. At the same time, having a good mentor on the job makes ALL the difference. And for you young buls still in school I'll tell you what nobody told me in college, make sure you get an internship before you graduate and take the EIT exam before you graduate. Basically makes you a shoe in for these jobs. Otherwise, these cacs gonna eat up all the yams and leave you with your ribs touching.