How to invite only the right people from a large group?

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How to invite only the right people from a large group, and not offend the uninvited?
We have a group (more than 200 people).
Questions:
1. How to invite to events with a limited number of participants (up to 16), only newcomers and those who have positively proven themselves at previous meetings? (and without offending the uninvited).
2. We need a mechanism for quick registration.
Is there something similar to VK groups? THOSE. where you can see photos of those who signed up for the event.
And it is desirable that the participants do not see the total number of those who signed up for the event (to choose 16 out of those who signed up, for example, 30).