Communications Site - sharing content externally

We are a small charity with a small team of volunteers and members.

I would like to setup a dedicated MS 365 Communication site to share content such as newsletters with our members. Members are external to our 365 environment, but are added as contacts - a distribution list has been created using the contacts.

I've looked at many sites, YouTube videos etc. but struggling to make this work in a safe way. I'm assuming a dedicated SharePoint comms site would be best for security reasons, perhaps allowing specific privileges, but any help appreciated?