Some Questions before go live

Hi,
I have some Questions i’d appreciate if you can help me:
1. How to control the speed of the hero banner words writing
2. Can i upload font to use
3. how can i control the fonts of the sections as i can only choose from Header 1, header 2 ..etc and paragraph and i’d like to change the font/ size of paragraph?
4. Can i add a pop up window to subscribe to mail list once the site opens?

Thanks,
Ahmed