We have some instructions on how to set up basic configurations: https://gitlab.com/lightning-signer/validating-lightning-signer/-/blob/main/contrib/howto/README.md

These are for early adopters, folks who are already comfortable with unix CLI and lightning node setup and operation.

Making an umbrel (or similar) version will make it even easier ...

There shouldn't be much overhead, you will be asked to confirm spends to unknown destinations, for example

Both! VLS encapsulates the minimum amount of state required to maintain custody, so it's useful for both high end operations using a HSM and individuals using a personal signing device

Thanks, this looks really interesting!