You can restrict who can see your posts with post visibilities. There are four kinds:

-"Public" is visible to everyone.

-"Unlisted" is visible to everyone but doesn't show up in searches or trends.

-"Followers-Only" is only visible to people who follow you. If you use this, switch on follow requests too so you can screen who gets to see your Followers-Only posts.

-"Mentions" is only visible to accounts mentioned in the post.

More info on how to use them: https://fedi.tips/who-can-see-my-posts-in-mastodon-how-do-i-send-dms-in-mastodon/

#FediTips