Some menu customisations

Hello, I would appreciate any help re: the following–

1. How do I create a line between each item on the menu, i.e. a vertical line between each menu header, as well as a horizontal line in the dropdown menu? Please see:

https://imgur.com/hHzZcHQ,tcnWbKs#0

https://imgur.com/hHzZcHQ,tcnWbKs#1

2. How do I put an arrow as well on the menu which have dropdown items?

3. How do I remove the Home icon?

Thanks.