Currently I have a rich text field in my collection types where I want to place an HTML table with css as well. Is this possible?
If I remeber correctly the rich text field editor is a markdown editor not html.
Yes you can do something like this, Look into swapping out the default rich text editor with something like CKEditor. Strapi has some old docs on it which you can find if you look on the site. Outdated a bit so you will probably have to try some stuff out to get it working but I recently implemented it so its doable