@Giri the only thing you can do is lock your account so you have to manually approve followers, and then make sure all of your posts have locked privacy.
@beardalaxy There are many publications. It would be easier to delete it.
@son_of_the_paladin @Giri you don't have to delete posts or delete your account, you can go back and edit all the posts you want to be private. that's a lot of work to go through, though.