How to add a question to input your social media and phone number on this form

[benjamids]

I was wondering how I can add a section to input the customers phone number as well as their social media on two seperate lines below “name” and “email”. Also where would this information be stored

My theme is impusle and my store is naturalvitaminsusa.com

Thank you for any help you can provide

[softopia]

Did you use any app to create this page? if not then open your current theme and edit this page and add 2 new fields.

[benjamids]

I added this code in the content section. However looks like this. How would I have these two sections side by side and structured like the name and email inputs are?