Q: iCloud features other products offer

Is there an option to have a folder in iCloud Drive I can share with my family similar to what can be done with Dropbox? We keep some family reference documents in a shared folder that we can each update and access from our devices or remotely and it is a very useful Dropbox feature.

Another Q - I would like to keep my Macbook backed up to the cloud too. I realise Time Machine does not do this and iCloud has not been designed as a primary back-up medium but is there a way to achieve this as it also seems like a useful feature that other cloud storage providers offer.