Password and post Approval issue

Hi,

Regarding registration, please check this tutorial: https://sitenerdy.com/add-password-field-in-wordpress-registration-form/. With an additional plugin, you can achieve that.

And for publishing posts, try this plugin: https://ww.wp.xz.cn/plugins/capability-manager-enhanced/. It would allow you to specify capabilities for roles. I don’t know what role is your default users role, but you can add publish capability with this plugin.