dasReaper, Welcome to the forum here. The handloading isn't difficult but if just starting it will take a while to reap the benefits of saving money whereas you will enjoy the custom ammo you can make to suit your needs. Yes many components are spotty but have been steadily increasing in availabilities. Recently the Academy Store started to handle primers down here. No word on if they will handle powders...
You will need to be internet savvy to grasp the supplies when you can find them, you will need to comb your local area and forums too, looking for the best deals vs, shipping and handling and Haz-Mat cost.
That being said Carbide dies are a must for the 10mm and 40S&W, pass-through sizing is a big plus (study this option) to recondition your brass. Balance Beam scales (quality is what you pay for) are a good choice for trickling hand weighed charges, Digital scales can drift and require rezeroing (quality varies).
You will have to have a relationship with the scales so you know just how they work, their shortcomings and the advantages as the meet your needs. Your life can depend on your understanding and their accuracy.
You can not have enough data to cross reference, here you can find plenty to download for free as published by the powder makers over the years.
If you have time, drop by the 10mmFirearms forum, many 10mm enthusiast are there as well. Plenty info at your disposal. http://10mm-firearms.com/index.php
Best regards and congrats on your newly found hobby!