NOT THE SAME AT ALL!!! (Everyone knows 9mm is wimpy girly ammo!)
Just sit back, relax a bit Amsdorf, and enjoy all of it. I understand your excitement but try to take one thing at a time. If you want to get a box of ammo off the shelf tomorrow morning and go shoot that's great and your choice and more power to you. You know there's at least a miniscule chance shooting commercial ammo without an adj plug has damaged some M1's but it by far probably won't. You just can't ask on a forum until someone says says it won't ever hurt it, and then it makes it 100% safe.
Everyone is different and has their own pace. I took almost a year before I bought my first M1 and bought it from a good friend of my good friend I knew and trusted with his knowledge of what I was buying. After I got it I waited until he had time to carefully go through it with me there with him. That was part of the enjoyment for me. He (at least tried) to explain things to me as he went through it and I didn't actually fire it until a week or so later.
I hope you have a great first trip to the range with your M1. Let us know how it shoots and bring back some pictures of what's left of it when you're done. (Gotcha!)
Seriously, this is a great group here and everyone will do everything they can to help, but we really try to keep heated debates about the few same old issues that have no answers out of the threads. Commercial vs not is a personal preference and choice.
Regards,
~ Harlan