There is a lot of good advice on this thread. I would have to second the opinion that your instructors don't know what they are talking about as far as getting a federal LEO job. While every agency is different, most have the same Constitutional limitations. All of that will carry from agency to agency. Shooting a firearm is the same no matter what make or calibre. You might have to hold or reload the firearm differently, but the fundamentals are all the same (sight alignment, breath control, smooth trigger pull).
Getting a federal 1811 job out of college is very tough, but not impossible. My advice for prospective feds is to apply and go on with your life. The hiring process can be very long, like measured in years not months. Keep in shape and do whatever you can to make yourself a better candidate.
But when a long train of abuses and usurpations, pursuing invariably the same object, evinces a design to reduce them under absolute Despotism, it is their right, it is their duty, to throw off such Government, and to provide new guards for their future security.
Translation for the intellectually challenged: If the government screws the people too much, it is the right and duty of the people to revolt and form a new government.