You don't say where you are from, but check out your area's Operating Engineer's Apprenticeship Program. Your guidence conselor should be able to help you find some info on it. It is a 4 year program, which includes on the job training, and also class room, both training site, and inside classes. They should also give tours once a year, and give you an idea what the job outlook should be.
I started out in it, in 1973. Things looked very good in the future, but then the gas embargo hit, and the big road construction jobs came to a halt. I was in it for 3 years, and never saw a job. There were 35 in our class, and just a few got hit and miss jobs. I can say I did learn a lot about equipment care, and how to operate. There is a difference between running something, and being an operator...
I did secure a job with the Ohio DOT to carry me through, until hopefully the construction trade opened up again, but it did not. I was either 30 years too late, or too soon. After 15 years with the DOT, I did transfer to a heavy equipment crew, that worked in 7 counties in our district. It took me that 15 years, to be making what I would have been as an apprentice back in '73. The money wasn't great, but we had good benefits, and the ability to retire after 30 years of service. If I'd have stayed in the OE's, I'd still be looking at working until I was 65, rather than retiring over 7 years ago, at age 50.
It does seem to be picking back up some. With the infrastructure of the US outliving it's life expectancy by probably 15-20 years or more, it will need to definitely need to be rebuilt. It's going to take some serious money to do this.
When the interstate system was built, through the 60's, it cost 1 million dollars per mile on average to build. Now, it is 1 million + per mile, just to replace/revamp the pavement, bridges, and improve drainage systems.
With the economy in it's present shape, it will be hit and miss for a while. You have a few years to check things out, and hopefully the powers that be will work together to get this country back on track.
Like my Dad told me many years ago... 90% of your job, is loving what you do. I loved operating, so I loved going to work at least 95% of the time. I'd do it all over again, in a heartbeat....