This instruction is written specifically for the teams that want to use only 1 paid account in Notion, leaving everyone else with the free option.
If you are ready to invest in your infrastructure and buy accounts for everyone on your team to have better control over sharing options, permissions, and security — we strongly recommend you follow the official Notion guide on Team Workspaces
Otherwise, you have two options — to share a specific page with a team member or to give access to the whole space. The steps for that would be the same, the only difference is on which page you are performing the actions.
If you want to share a specific page, without access to any other page — please, perform the following steps on the desired page.
If you want to grant access to every page in the workspace - perform the following steps on the The Ultimate Space For Your Team page itself