Create new post action tutorial

Anyone here can create a tutorial for the pro forms create new post using custom post type. Im really confuse on how to use it properly

I have a custom post type “Activity” and has a custom taxonomy “activity-categories”.
On the screenshot provided. I have select field which it contains the parent category and on the check field is the child category which has a conditional logic.

Im having problems on how to add the fields for the select and checkbox field in the category of the cpt