While we can’t offer customization services, I am more than happy to guide you to the closest possible features.
1. & 3. I recommend checking the advanced title and content field features.
2. The results grouping allows organization either by post type, content type or categories but no all at the same time. If you expect more than 1 post type, but only 1 taxonomy, then post type categorization is the best option here: https://i.imgur.com/kNsDwXw.png
The “Other results” container is then basically the container for all the category results. I have set it up like that for you.
