I have an European Switch yes

Okay, that would be awesome, is there a Guide or Tutorial on how to update the "proper" way without losing AutoRCM?
I don't think there is really a guide so I'll explain the process. First you need to connect to your Nintendo account and disable the telemetry option (that's only possible with a european account, thanks to GDPR), for this you can follow the step 2 indicated here :
https://switch.homebrew.guide/hacking/fuseegelee/safetyprecautions.html?highlight=disable
After that you will have to boot your sysNAND under CFW in order to update with ChoiDuJourNX. If you only do that and reboot to stock HOS as soon as the update is done you should not get banned. I've been doing it since 4.0 tu keep my sysNAND updated and have never been banned, but I can't 100% guarantee it for you and you should decide for yourself if it's a risk worth taking, however small it probably is.
I can detail the exact process I personally follow :
1) I boot my switch on stock HOS and connect it to the internet.
2) I open the settings, go to system and just open the system update menu to force the switch to download the latest firmware update. Do not press the "update" option once you've opened this menu as it would start the official update. Instead just qui it by hitting B.
3) I wait for a few minutes, until the line under "system update" no longer tell what version of FW I'm on but instead says "system update ready". This means that the update has been downloaded in the background.
4) I reboot my sysNAND under CFW.
5) I use Firmware Dumper to dump the pending update to my sd card (this can take a while). You can find it here
https://gbatemp.net/threads/firmware-dumper.522522/
6) I use ChoiDuJourNX to apply the update from the sd card.
7) I reboot on stock HOS after the update is done.
There are other ways to get the update files than going through steps 2 and 3, like downloading it from xbins, but these are the closest to the regular update process since it does connect to Nintendo's servers to get the files.