Personalised question to include their name

Hi,

I’m trying to figure out how I can personalise my Typeform question so that when someone types their name in my first question, my second question includes their first name from the first question.

I’ve seen that we can use it from the templates provided (example below) but i’m wondering how I can add it to the existing Typeform I have now as it’s already been published and I want to continue using that one.

Thank you very much.