Thank you so much for all the warm answers from me who are always super beginners.

I am very encouraged by your advice as I work alone.

This time ...

While you're still learning HTML, you can burn yourself! !
I thought of a server contract with wpX and got a domain with your name .com ... but

①What is the authentication method for domain authentication?

② Is there an additional charge to create an email address from the acquired domain?

③ After linking wpX and the acquired domain, what should I start with WordPress?

The above three are mainly unclear.

It may be a question unrelated to programming, but I asked you if you knew it.

If i have any answers or recommended articles, thank you!