Can I use both toggle switch and checkbox in one modal?

First of all, I am not a native speaker, I ask for your understanding even if the writing is weird. I'll explain it in as much detail as possible. If you need further explanation, please leave a comment.

This is a modal, can change the settings and the status (on/off) of action.

1. Toggle switches at top right changes the status of action immediately. (turn on and off).
2. Under the switch, can change a settings of action and saves with '저장'(is 'save' in Korean).
3. '저장' is not "save all changes and close modal" but "just save the settings you've changed".
4. Modal doesn't have close button with clear expression, only 'X' at the top right corner do the job.

I'm thinking of the following ways to improve.

1. I think checkbox is better than toggle switches in this modal.
2. Move the button 'save' to modal-side, not in content.
3. Change the button's action to "save all changes and quit modal", not just "save changes and leave it alone".

I wonder what other people are thinking. Is it okay to improve this mode the way I think ? Or just leave it as it is? Is there a better opinion?

Thanks.