Excellent purchase! A 32-20 has intrigued me, but the ammo seems to be problematic. Do you reload? I do, but have read about the difficulty reloading due to paper thin case mouth. Am I overly concerned?
You are overly concerned and have read too many posts by "keyboard commandos" who simply parrot the complaints of others that have never loaded this cartridge! I have been loading this for about 60 years and have rarely lost a case during loading, and when I did it was most likely my fault.
My very first "range pick-up" cases were 2 .32-20 cases, about 1948, when I was 4 years old. I probably still have them. I was thrilled to find some real ammunition items to go with my budding cap gun collection

.They were found on the south side of the Florence pumping station on Pershing Drive in Omaha, Neb, where someone had probably been shooting at floating debris on the Missouri River.
Just be reasonably careful and you shouldn't have any problems with the .32-20. You will love it!
Just watch closely for squibs, for some reason there are many .32-20 revolvers with ringed (bulged) barrels, my first .32-20 has one. At one time I replaced the barrel with a NOS 4" my dad had picked up. It didn't shoot as well as the original bulged barrel, so the original barrel was returned to the gun.
Invariably someone will warn about "High Velocity Rifle loads. Well, you're extremely un-likely to see any of these since the last ones loaded were about 1960.
ALL .32-20 ammunition is "rifle ammunition" since it is really, and always has been, a rifle cartridge! I believe Remington is the only one putting "Hi Speed" on its boxes. Simply stick to lead bulleted ammunition, or flat-point bullets if shooting factory, (I don't think any of the majors currently load jacketed bullets of any type). The ammunition everyone warns about is loaded with a jacketed, round-nosed hollow-point bullet. Again, you will never see any, and then only at collector prices.
And, BTW, if you take up loading this cartridge, only Remington makes (or did

) full length cases. StarLine and Winchester cases are .040" short at 1.275", full length is 1.315" Just a loading issue, doesn't affect shooting.