Um, you can't edit your previous Notes in the iOS Notes app? That's odd, because I have no problem doing that.
Are you sure you're doing it right?
Are you in Europe?
Do you need an adaptor?
And you didn't have a Apple Support Community Account until yesterday, as shown on your profile. You may have had an Apple ID. But you had to actually create a USERNAME for this forum. Your Apple ID isn't automatically your username for this forum. You have to set that up when you first use your Apple ID here.... in other words, when you set up your account for this forum.
And like I said, if you want a Notes app you can LOCK... Google it. I found the one I linked in ten seconds, mate.
I had an apple account, the 2 seconds it took me to create a forum username were not exactly a chore.
Re the issue, perhaps you want to read the thread so that you know what the issue is, rather than talking about something completely different.
We are talking about the notes field on contacts, not having a separate notes app you can lock, which everyone knows are readily available. Keep up at the back.