No. it only takes 10-30 MB of ram in idle mode anyway, It's better to not obsess about it. Windows update can break many things but haven't heard about windows update breaking office installation.
YAOCTRU generates download links, to download the setup files to your harddrive or a cmd that automates it. YAOCTRI configurates and installs it.
Such non KMS product can be activated by installing corresponding KMS product licences. KMS_VL_ALL does it by default, in case of Home Student 2019, Office 2019 Standard licenses will be installed.
This thread was referenced. Many tools are available. None have descriptions. Does one do conversions? TIA