Possum gave some great suggestions. Start with the lowest load and work up, that way if you have pressure problems mid way, you aren't working with overpressure loads. Also, be sure to replace the target after each group of loads and be sure to mark the targets with the load so that you can analyze them when you get home.
The only sure way to know the pressure is the have pressure measuring equipment hooked up to the gun. Since most of us don't have the $$$$$ that it takes to buy this stuff, we do the next best thing, which is look at the case. One sign to look for is sticky extraction. If the bolt is hard to lift, or if it is a single shot and the extraction is difficult or you have to dig the case out of the chamber, that is a sign you might have high pressure. It could also be a sign of a dirty chamber.
An other sign of high pressure is flattened primers. If they are flat, and fill the primer pocket completely and possibly flow back into the firing pin channel, you have signs of over pressure. Popped primers could be a sign of high pressure, it could also be a sign of worn out brass. Federal brass has an especially bad rep for loose primer pockets after the first firing. I know shooters that won't reload Federal brass, although I will and if it pops a primer, I throw it in the recycle bin. The main thing to remember is that if ANYTHING doesn't feel right, STOP and figure out where the problem is.
As long as you followed the manual, and know that your powder charges are correct, I see a long and enjoyable future of reloading for you. Be sure to check in after you shoot your loads and let us know how they shoot. Also give us an update on how many fingers you have left... :biggrin: