How to recover MacBook Air from a deleted "Macintosh HD"

Hi everyone,

I'm afraid I've done significant damage to my 2018 Macbook Air 13'.

Since the day of purchase (NEW), it has always been very slow. Feeling discouraged, I decided to put it aside to buy an Asus gaming laptop that I also use for work.

Having to make an important trip, I decided to take it back and fix it.

I looked at various videos online and got to the point of deciding to format it.

Instead of initializing the "Macintosh Hd" I decided to delete it and then I initialized the main one... 🙁 The problem is that now, if I try to restart it normally, it compares the folder with the question mark and if I try to enter the recovery mod compare a countdown with the spinning globe but it all ends with an always different error (for example 9000f).

But the code of error changes continually :(

Could you help me? How can I move?

Thank you infinitely!

[Re-Titled by Moderator]