Referral code and Publisher questions

Hi. I want to ask where I can find my referral code.
Can I use my own referral code to install Brave browser on my mom’s phone?
Can I connect 2 more brave accounts to my uphold?

This is a separate question.
What happens if I allow brave browser to show ads on my website? will they be just like the ads on the browser which pops up and disappears or is it like google ads?

Sorry for the long post and thanks for your response.