Dual boot MacBook with same MacOs versions and 2 different apple id's

Good day!

I was planning to create a dual boot MacBook Pro with both the latest MacOs.

Reason is that I need safe volume and another volume to experiment with MacPorts and other suff.

I thought it would also be good to create an additional Apple ID in order to reduce the risk of exposing privacy sensitive data to the experimentation volume, but at the same time use the Apple ID features with a second Id.

I now have a working dual boot system, but it looks like it is mixing up the apple id's. E.g. if I try to switch on keychain on the experimentation volume with second Apple ID logged in, it tries to switch keychain off for my primary Apple ID. Also, after installing the second volume, the account set-up took forever, I had to force switch off the MacBook to be able to continue.

I did create the second volume normally using disk utility and installed MacOs on it with recovery boot, command-R. Everything looks right there, each volume has a -data partition and switching boot volume works ok.

But before I break anything, ...

... is it possible what I'm trying to do?

... any tips?

Thanks and kind regards, Bart.