Reveal text box based on option selection from list in Forms

Site URL: https://violet-jellyfish-ckhh.squarespace.com/careers

I want to display custome requirements (text box) for each role based on the Role selection from the list.

Additionally, I want checkboxes and radio buttons to appear side by side (like First Name and Last Name)

I Would also like to do something like this. I'd like the user to be able to add another text box for "additional projects", so they can submit multiple projects per form.  I'd like them to be able to list their project if they have multiple but the form should only have one project window on the original form but the option to add more if they have them.

Anyone have any ideas?