A newbie should not start out on a progressive reloader, especially with the 5.7x28, it is a finicky round. You might want to see if you can find a used rockchucker to start out with, or a Lee Anniversary Kit.
YAh ship just hold off on that if you would like to start reloading I started on a Dillion 550B is the way to go but you have to start with a pistol load the 5.7 is a advanced round to load since it is so new and load data is just comming out now plus the case coating ect dies will be made long after they stop producing ammo...IMO
If this does ever happen- cuz you never know, I have you covered. I have over 5k in spent cases and have three extra sets of dies. I can provide you with a detailed step by step process to reloading the 5.7
and Yes, if you just want to buy a set of dies just in case for the future... go to the place you said...Midwayusa, look for either the Hornady die set or the RCBS 5.7 FL Die set for around $30.
Also, from what I have been told by FN is that the SS197 (which is Mfg. in the states by Fiocchi) does have a primer which last longer than the SS195. So you are good with the idea of picking up a little more of the SS197.