Agree with most points here.
If you recently started, you have to condition yourself to hit a lot of balls.
Some main pointers about going to the range I've found, try them, or don't.
1. Practice like you're playing. Take a few practice swings, and set up like you would on the course. It gets you into a good habit and muscle memory is better as well. You don't always have to do this, but if you do this, it should help you from getting too fatigued.
2. Focus on tempo and rhythm above all things.This way you're not just hitting balls mindlessly.
3. Start out with driver or longer clubs. This is for a couple reasons. First of all, when you go on the course, most courses start with a driver shot. Also, I think this loosens you up for the rest of your range session. If you are getting tired, it is easier to hit good short iron/wedge shots than long irons/woods.
Good luck!