Make my e-mail to stio.studio

I have created a website https://stio.studio and want to create a e-mail. I tried to do the tutorial to cloudflare but I think I messed something up.
Info:
I bought the stio.studio domain thru porkbun
I use github for my website
I am totally new to all of e.mail, url, dns and stuff

(I don't know what tags to use