I see NOT to upgrade my new device to Android 13 - got that.
However - is it 'safe' to install the current GrapheneOS (android 12) - and then udpate to GrapheneOS (android13) when it is available?
Any reason why I should just wait to install GOS - Android 13?
...(trying to minimize the amount of time on running non-GrapheneOS on this device. (just showed up today - wow - it is beautiful - excited to setup... though I am still waiting on my Sim Card to be delivered (I only have an old one from my Pixel 3 - so I understand it is best to use a new one!)